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Yawning may keep us 'on the ball'
Yawning may appear the height of rudeness, but in fact your body is desperately trying to keep you awake, according to research from the US.
Psychologists who studied 44 students concluded that yawning sent cooler air to the brain, helping it to stay alert.

Yawning therefore delays sleep rather than promotes it, the study in Evolutionary Psychology suggested.

The desire to yawn when others do so may also be a mechanism to help a group stay alert in the face of danger.

Chill out

The common wisdom is that people yawn because they need oxygen, but the researchers at the University of Albany in New York said their experiments showed that raising or lowering oxygen and carbon dioxide levels in the blood did not produce that reaction.


The next time you are telling a story and a listener yawns there is no need to be offended - yawning, a physiological mechanism designed to maintain attention, turns out to be a compliment


Their evidence suggested instead that drawing in air helps cool the brain and helps it work more effectively.

In a study of the 44 students, researchers found that those who breathed through the nose rather than the mouth were less likely to yawn when watching a video of other people yawning.

This was because vessels in the nasal cavity sent cool blood to the brain, they said.

The same effect was found among those who held a cool pack to their forehead, while those who held a warm or room-temperature pack yawned when watching the video.

"Since yawning occurs when brain temperature rises, sending cool blood to the brain serves to maintain optimal levels of mental efficiency," the authors wrote.

"So the next time you are telling a story and a listener yawns there is no need to be offended - yawning, a physiological mechanism designed to maintain attention, turns out to be a compliment."




Story from BBC NEWS:
http://news.bbc.co.uk/go/pr/fr/-/2/hi/health/6268428.stm

Published: 2007/07/04 08:56:59 GMT

© BBC MMVII
 
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Water vapour found on exoplanet
Astronomers have found water vapour in the atmosphere of a giant planet outside our Solar System.
The detection in the extrasolar planet HD 189733b was made using Nasa's powerful Spitzer Space Telescope and is reported in the journal Nature.

The team looked for the signal of water absorption in starlight poking through the edges of the atmosphere when the planet passed in front of its star.

It is only the second time water has been detected on an exoplanet.

Some researchers suggest that the presence of water could be a feature that is common to all gas giants - the type of planet represented by Jupiter, Saturn, Uranus and Neptune in our own Solar System.


The 'holy grail' for today's planet hunters is to find an Earth-like planet that also has water in its atmosphere
Giovanna Tinetti, UCL

HD 189733b orbits a star in the constellation of Vulpecula (the Fox), which is 64 light-years from our Sun.
Although water is a key ingredient for biology, the planet is far too hot to harbour life.

It orbits extremely close to its parent star - more than 30 times closer to its star than the Earth is to the Sun.

As such, temperatures range from a scorching 930C on the dayside of the planet, to a relatively balmy 700 Kelvin on the nightside. This type of planet is known as a "hot Jupiter".

Letting off steam

Giovanna Tinetti, from University College London and colleagues, measured the radius of the hot Jupiter HD 189733b at different wavelengths by tracking how much starlight is blocked by the planet as it crosses in front of its parent star as viewed from Earth.

The planet looked bigger at the wavelength bands that corresponded to water, suggesting water vapour was present in its atmosphere.


"Although HD 189733b is far from being habitable - and actually provides a rather hostile environment - our discovery shows that water might be more common out there than previously thought," said Dr Tinetti.
She added: "Our method can be used in the future to study more 'life-friendly' environments."

Another team of astronomers previously detected water vapour in the atmosphere of a "hot Jupiter" called HD 209458b. The study, by astronomers in the US, was published in the Astrophysical Journal earlier this year.

But some critics have argued that instrument effects in this data could have created the same signal as water vapour.

Life search

Dr Tinetti said: "The 'holy grail' for today's planet hunters is to find an Earth-like planet that also has water in its atmosphere.

"When it happens, that discovery will provide real evidence that planets outside our Solar System might harbour life."

Co-author Sean Carey of the Spitzer Science Center in California commented: "Finding water on this planet implies that other planets in the Universe, possibly even rocky ones, could also have water."

Earlier this year, the Spitzer Space Telescope became the first telescope to analyse, or break apart, the light from two transiting "hot Jupiters", HD 189733b and HD 209458b.

This led to the first-ever "fingerprint", or spectrum, of an exoplanet's light.


Story from BBC NEWS:
http://news.bbc.co.uk/go/pr/fr/-/2/hi/science/nature/6292076.stm

Published: 2007/07/11 19:21:28 GMT

© BBC MMVII
 
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good morning folks to todays edition of borgza's Science & Technology UPDATES its 8:30 am Eastern time here in North America (Canada) a beautiful weather today pretty cool compare to the past few days sunny and quite a view so i have some updates for you all here it is



UK 'needs clear space strategy'
By Paul Rincon
Science reporter, BBC News



The UK government needs to develop a more coherent strategy on space, or risk falling behind other countries, a House of Commons committee has warned.
But MPs did not support calls for the creation of a UK Space Agency.

Many scientists say a space agency would give Britain more influence in determining international space policy.

The committee also said there should be no policy block on the UK fielding astronauts, or on developing its own rockets for launching satellites.


Observers say that despite having many leading space scientists and some of the best industry expertise, the UK remains a bit-part player on the international stage.


In order to stay in the game and ahead of the game we now have to take some very hard decisions, both in research terms and in commercial terms.
Phil Willis MP, Science & Technology Committee chairman

Britain's lack of influence means that it misses out on lucrative contracts to build science instruments and spacecraft, they argue.
Many scientists believe this is because individual space programmes are overseen by several different government departments, resulting in a lack of coherency when it comes to overall space policy.

The report by the House of Commons Science & Technology Committee agrees that there are many problems with the current situation.

The British National Space Centre (BNSC) was set up to oversee the UK's space activities.

But the report said the BNSC lacked leadership and co-ordination. It said that a low profile and poor resources contributed to the current problems.

Evidence to the committee suggested the worldwide perception of the BNSC was of an organisation with "no budget and therefore no power, whose consultative nature renders it ineffectual in the promotion of UK space interests".

Trading on past?

Phil Willis MP, the committee's chairman commented: "There is no doubt that UK space is a big success story, but there is no doubt either that we are living on past investments."


He added: "In order to stay in the game and ahead of the game we now have to take some very hard decisions, both in research terms and in commercial terms. First of all, we need focus.
"If the European Space Agency [Esa] is to be our main vehicle, then we need a far tougher approach to negotiations with them, and that is where the BNSC can play such an important role."

The report stopped short of endorsing the call, from the UK's Royal Society among others, for a full UK space agency with overall authority for British space activities.

It opted instead to recommend strengthening the BNSC's role, a decision which will disappoint many in the space community.

However, the committee said such an agency would not be able to shoulder the accompanying responsibilities based on current levels of funding.

In 2005-6, the UK spent £207.61m on space, far less than the sums invested by France, Italy and Germany during the same period.

'Comprehensive work'

George Fraser, director of the University of Leicester's Space Research Centre, called the Science & Technology Committee's report a comprehensive and detailed work.

But he added: "They have set themselves a difficulty in that they've assumed that there won't be any large-scale increase in funding so the status quo will be perpetuated.

"The select committee might have been more minded to agree with us had there been a budget there to make radical change, and I guess they anticipate there won't be, so BNSC has got to be encouraged and adapted."

The committee also criticised the UK's traditional rejection of involvement in manned spaceflight and launcher systems.

Although a member state of Esa, the UK gives no funds to the space agency's astronaut corps.

The report recommended that the UK leave the option of such missions open, to be considered like other proposals and judged according to the best science.

But, ultimately, the £150m annual cost of joining astronaut programmes could prove prohibitive.

Giving evidence to the committee, Dr David Tsiklauri from the University of Salford argued that the absence of space vehicle launching capability had reduced the UK's competitiveness in the global market.

Andrew Weston from the University of Warwick told the committee the UK could reap significant economic and technological benefits from developing its own launch capability.

The Ministry of Defence (MOD) has said it is exploring a dialogue with industry and others on developing a low-cost launcher for small satellites.

The prospect raises the possibility of a British version of the X-Prize - the US competition to develop the first private space vehicle.

Funds working harder

"We heard plenty of evidence to say there was a sufficient supply of launchers, either from the US, or Russia, or Europe through Ariane," Mr Willis told BBC News.

"But we then heard other evidence that getting the right launcher at the right time was not quite as easy as had been suggested.

"It may well be that in the future, we need that technology either in a military sense or in a civil sense, which is why we have recommended that there ought to be a closer link between the MOD and civilian space in order to develop launcher technology if that is what we want to do."

Industry believes one of the best ways limited government funding can be made to work harder is by backing Esa's technology "seedcorn" fund known as Artes (Advanced Research in Telecommunications Systems).

The programme puts money into basic research and product development. Industry says it provides a 7:1 return, and has called for the UK contribution to be significantly increased to £30m (approximately 44m euros).

David Williams runs Avanti Screenmedia PLC which will soon launch the Hylas satellite to deliver broadband internet services to rural Europe. He said Britain and Europe needed to work smarter.

"The Chinese and the Indians are overtaking us in space; they are spending billions and we can't compete with that," he told BBC News.

"What we can do is maintain a cutting edge by always being at the very zenith of new technology. What I did with Hylas was take some government R&D money and marry it with City money and deploy it in real time. If the government picks winners and gets technology into space quickly, we can maintain a competitive advantage."

The Commons committee supports this view and has called on government to review its Artes contributions.

The BNSC is currently drafting a new UK space strategy, which is due for publication later in the year.
Story from BBC NEWS:
http://news.bbc.co.uk/go/pr/fr/-/2/hi/science/nature/6901835.stm

Published: 2007/07/17 00:06:17 GMT

© BBC MMVII
 
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Galileo challenges sat-nav firms
By Jonathan Fildes
Science and technology reporter, BBC News



Entrepreneurs are being urged to look to the future of satellite navigation.
A competition, which aims to find novel ideas that exploit the pin-point accuracy of Europe's soon-to-launch Galileo system, is calling for entries.

Previous winners include a system that monitors changes in the ground that occur before an earthquake strikes.

The eventual winner of the UK Satellite Navigation Challenge will then compete in a European tournament for cash and support to kick-start the business.

"Everybody has been amazed at what clever entrepreneurs have been able to do [with GPS]; it does far more than what anyone could have dreamed of when they invented the system," said Richard Peckham of EADS Astrium Navigation, and one of the Judges of the UK competition.

"I think the same will be true in the future when you have Galileo plus GPS."

He said the UK competition was primarily looking for something that had business potential.

"You are also looking for novelty and whether people will be one day willing to pay for the capability."

Time-keeper

Last year's competition, for example, was won by Genesys Consultancy, which suggested a product to help predict natural disasters like volcanic eruptions and earthquakes.

Unlike previous winners, GeoSynch, as the product is known, primarily uses the increased accuracy of the timing signals from the Galileo satellites rather than its positioning application.

The company triumphed in both the UK challenge and the European Galileo Masters.


GALILEO UNDER CONSTRUCTION
A European Commission and European Space Agency project
30 satellites to be launched in batches by end of 2011-12
Will work alongside US GPS and Russian Glonass systems
Promises real-time positioning down to less than a metre
Guaranteed under all but most extreme circumstances
Suitable for safety-critical roles where lives depend on service


The system could also help oil companies keep track of their reserves and improve prospecting for gas, water or even archaeological ruins.

"The background to this is seismology," explained Conor Keegan, director of Genesys Consultancy.

Seismology is an established technique, often used in the oil industry, which allows scientists to peer beneath the surface of the Earth.

By studying how sound waves produced by earthquakes or artificial sources, such as explosions, are reflected by different subsurface layers, seismologists can build up a picture of the structures beneath their feet.

The technique can be expensive and time consuming. However, GeoSynch should reduce this cost.

"There is also a considerable gain in accuracy over what is used today," said Mr Keegan.

GeoSynch will take advantage of the Galileo satellites' onboard atomic clocks to accurately measure the time between when waves leave a controlled source and when they are picked up by an array of iPod-sized wireless ground sensors.

When a system has to measure sound waves travelling at 8km/s, tiny fractions of a second count.

"That will allow you to improve the accuracy of the time measurement by a few orders of magnitude," Mr Keegan told the BBC News website.

Disaster monitoring

This improvement will allow seismologists to gain new insights into subterranean features and processes.

"One of the main users we see for this is oil and gas prospecting companies," said Mr Keegan.


But rather than helping them to find new reserves, GeoSynch may allow them to work out when to stop pumping oil.
"Today there is no way of accurately measuring the depletion in an oil field," he said.

"If the oil reserves drop down below a certain level it is no longer commercially viable for them to continue working it." By mapping tiny subsurface changes, GeoSynch should have the accuracy to tell them when to stop.

But the application is not just limited to the oil industry. Mr Keegan also believes that it could be used to predict natural disasters.

"Before an earthquake there is compression of a fault and then that is released," he explained.

"When you compress earth it changes in density and there is therefore a change in the speed of sound [travelling through it]."

By measuring these subtle shifts and comparing them to areas where there is a build up of stress in the Earth's crust, Mr Keegan believes the system could help predict the cataclysmic events.

Prize draw

He is now working towards building a prototype of the system, helped along by the cash he received from the Galileo Masters.

"If everything goes to plan we could commercialise this in three years," he said.

That would mean that he could be up and running using the US GPS system even before the Galileo system is switched on, a date currently set for 2012.

Then he may be joined by a raft of other fledgling businesses given a boost by the UK Satellite Navigation Challenge.

The winners of this year's competition will win more than £35,000 worth of prizes including a patent for their idea.

The European winner will win a further 10,000 euros and the possibility of working with the European Space Agency to develop the proposal.

"A lot of the ideas coming forward are very futuristic," said Adam Tucker of the Hertfordshire Business Incubation Centre (HBic), that runs the event. "What we are doing is providing them with a platform to assist them which may make them a commercial and viable business."

The competition's website will close to bids on 31 July.


Satellite navigation systems determine a position by measuring the distances to a number of known locations - the Galileo satellites
The distance to one satellite defines a sphere of possible solutions; the distances to four satellites defines a single, common area
The accuracy of the distance measurements determines how small the common area is and thus the accuracy of the final location
In practice, a receiver captures atomic-clock time signals sent from the satellites and converts them into the respective distances
The whole system is monitored from the ground to ensure satellite clocks do not drift and give out misleading timings


Story from BBC NEWS:
http://news.bbc.co.uk/go/pr/fr/-/2/hi/science/nature/6897944.stm

Published: 2007/07/17 07:29:33 GMT

© BBC MMVII
 
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Energy use 'drove human walking'

Humans evolved to walk upright because it uses less energy than travelling on all fours, according to researchers.
A US team compared the energy used by humans and by chimpanzees in walking.

The human bipedal gait is about four times more efficient than chimps getting around on either two or four legs, the researchers found.

Writing in Proceedings of the National Academy of Sciences (PNAS), they say this may explain why we walk bipedally, and some of our anatomical features.

Other research groups have proposed alternative explanations for our two-legged gait.

Some suggest it evolved because early humans needed to reach upwards to collect food or pass it to a mate, while others maintain it predates four-legged locomotion in primates, citing the often upright posture of orangutans as they move across slim branches.

On the treadmill

A study from 1973 found little difference in efficiency between two-legged and four-legged walking in primates, but its conclusions had been disputed because only juvenile chimpanzees were used.


We were able to show exactly why certain individuals were able to walk bipedally more cheaply than others
David Raichlen

So David Raichlen from the University of Arizona in Tucson and colleagues set up a study in which five adult chimps were trained to use a treadmill, either on two legs or four.
The subjects were fitted with masks to collect exhaled air so that parameters such as oxygen use could be measured. Blobs of white paint on critical parts of the body such as elbows and knees allowed researchers to analyse the gait using video.

The results were compared with four human subjects using the same treadmill.

Generally, the humans were about four times more efficient than the chimps.

Three of the chimps found bipedal walking used more energy than going on all fours. But one of the others showed the opposite pattern; and intriguingly, she was the only chimp to lengthen her stride.

"We were able to tie the energetic cost in chimps to their anatomy," noted Dr Raichlen.

"We were able to show exactly why certain individuals were able to walk bipedally more cheaply than others."

The hypothesis, then, is that early humans began to evolve in a direction which allowed for easy bipedal travel.

David Raichlen suggests that early humans should show adaptations such as a longer leg length, and that there are indications of this in fossils of the genus Australopithecus , such as the famous "Lucy" specimen discovered in Ethiopia in 1974.


Story from BBC NEWS:
http://news.bbc.co.uk/go/pr/fr/-/2/hi/science/nature/6902379.stm

Published: 2007/07/17 10:42:06 GMT

© BBC MMVII
 
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Sex sells, but at what cost?

VIEWPOINT
Matt Prescott


"Sex sells" is the mantra of advertisers, but our fixation with status symbols and material wealth is undermining our efforts to tackle climate change, argues Matt Prescott. In this week's Green Room, he outlines how he thinks we can love ourselves and the planet.


Climate change is an unintended side-effect of many of the ways in which we show off, such as driving over-sized cars... and buying the latest electronic gadgets


When it comes to tackling global challenges, human beings are both unique super-achievers and shameless under-achievers.
Unfortunately, many of the areas where we under-achieve are not randomly distributed, but tend to be related to protecting the environment or helping other people.

If we want to turn over a new leaf, I feel that we need to do a better job of learning from our past successes and failures, and to be honest about our limitations.

In terms of impressive achievements, it is hard to top the Moon landings.

Although wildly imaginative and ambitious, the objective of getting to the Moon and back enabled everyone involved to focus on a single, highly visible goal.


By comparison, humanity's efforts to tackle global poverty and climate change have frequently been insincere, mean-spirited and feeble.

Few of our efforts have been proportionate to the scale of the problems we face, our priorities have been complicated and confused, and no-one has ever been held accountable for the failure to deliver on our promises.

Given that we feel obliged to say that we care about the environment and other people, I am interested in why we have remained so consistently, and predictably, bad at turning our promises into effective action.

Material world

I have come to the conclusion that all humans suffer from a profound inner conflict. If we genuinely want to make a break from the status quo, I feel that we need to take a fresh look at ourselves.

A helpful first step would be to stop pretending that we are objective and rational decision makers, and to face up to the fact that we are riddled with emotions and conflicts of interest, which make it hard for us to share wealth, status and power.


In a world of 'bling', the last thing a car is used for is getting from A to B; it is a symbol of wealth, power and status, and a tool for enhancing a person's sex life


Although we have acquired an impressive, even dazzling, array of knowledge and cultures, it is our evolutionary past which has determined the senses we possess, the structure of our bodies, the hard-wiring of our brains and the ways in which we instinctively interact with each other and the world around us.

In addition, we are sexually reproducing creatures that must compete to attract a mate if we are ever to produce offspring; as well as social and hierarchical animals.

This means that we enjoy living in relatively small, stable family and social groups and instinctively rank everyone in our social group according to a combination of their beauty, intellect, physique, wealth, health and power.

To a considerable extent, how well we score in these criteria determines our social status, and thus how well we compete for sexual partners.

A positive side-effect of all this sexual competition is that it has encouraged us to strive for success and status in many different fields of human endeavour; from politics, business and science to art, music and medicine.

In early human societies, people were able to compete in non-lethal ways, by collecting beautiful objects such as feathers, unusual pebbles or animal skins.


The massive size and impressive quality of a peacock's tail is used to signal to females the size of handicap that a male can endure


A person who had the most spare time, strength or skill would, on average, be the one who collected the best status symbols, and thus impressed the potential sexual partners around them the most.

Without access to fossil fuels, it was hard to cheat, and these status symbols could generally be treated as reliable indicators of an individual's relative merits.

Now that we have succeeded in harnessing the world's fossil fuel reserves, our brains' fixation on visible status symbols has become something of a hindrance and much less reliable as a means of discriminating between potential mates.

In addition, modern technologies have given us a far greater capacity to alter and to degrade our environment.

Unnatural selection

In my view, climate change is an unintended side-effect of many of the ways in which we show off, such as driving over-sized cars, owning holiday homes and buying the latest electronic gadgets.

But where does our obsession with showing off come from?

In the animal kingdom, the massive size and impressive quality of a peacock's tail is used to signal to females the size of handicap that a male can endure while also meeting his basic needs. This is known as the handicap principle.

In humans, the tendency to show off how much we can afford to waste has resulted in gamblers risking the loss of a million dollars on the turn of the card, kings building palaces with hundreds of rooms, and rappers covering themselves in gold and silver as part of "bling" culture.


In a world of "bling", the last thing a car is used for is getting from A to B; it is a symbol of wealth, power and status, and a tool for enhancing a person's sex life.
If we cannot naturally restrain the ways in which we attempt to show off, because we want to attract the opposite sex, we need to take this into account and to develop fair and robust ways of making up for our own natural limitations and of taking carbon emissions out of the ways we compete with each other.

We are not going to stop being competitive as a species, but this does not mean we cannot foster co-operation and organise our social, economic and political activities in ways that allow us to align short-term competitive advantage with long-term sustainability.

Although big-picture targets are always going to be useful, I also feel that we should create some smaller, more tangible first steps for action. These could help us to feel secure about our social status, foster a sense of achievement and encourage changes in everyday activities.

For example, with energy-efficient light bulbs, I have found that once the logic of banning incandescent light bulbs was accepted it rapidly gained wider support, and allowed more ambitious solutions to become feasible.

As a social animal, we care what other people think about us, but don't like to admit weakness or to move first.

Where the temptation to go for short-term advantage is too great, we need to create robust ways of detecting, reporting and policing selfishness.

All of this means that in many respects, the human being is the weakest link in our decision-making process. The money and technologies are there if we want to make a difference.

It would only cost $10bn (£5bn) a year to provide 1.1 billion people with clean drinking water, yet we currently spend $38bn (£19bn) on pet food and $1,200bn (£600bn) on the world's military.

What we have so far lacked is the determination to act with purpose and passion.

I therefore hope we can rise above our usual excuses, and decide to give the world a helping hand in the same way that we committed ourselves to reaching for the Moon.


Dr Matt Prescott is an environmental consultant and director of banthebulb.org, an online campaign encouraging greater energy efficiency

The Green Room is a series of opinion pieces on environmental topics running weekly on the BBC News website





Add your comments on this Green Room article, using the form below.

I think this is one of the best and most concise reading of our failure to stop our degradation of the planet I've read in a long time. I'm emailing it to all my friends. This past year I've got a list of ten things I've done to reduce my footprint on the earth, but looking at them they're pretty small potatoes to the new clothes I love to buy, the driving I "have" to do, etc. Maybe by rereading this article periodically I can do better.
Cary O'Malley, surrey, B.C. Canada

I disagree. Banging on about being green is a growing status symbol, and one every bit as vacuous as a new car, clothes or electrical goods. 'Green' has become the new marketing tool, and people are falling over themselves to become carbon neutral and pay money to plant trees. The problem is that our society is built on the need for continual expansion and growth, and changing all the lightbulbs in your house and car sharing once a week really will not make any difference.
Imogen, London

I have a Prius. If I got a sexier car, my wife would not like it.
Jared, Dix Hills, U.S.A.

Most cannot afford an expensive car, but other consumer goods are relatively cheap. The problem is the fixation that many people (fuelled by the media) have about the famous, regardless how shallow many of these people are.
Neil Small, Scotland

Funny. Just had the car conversation with another engineer today. I am all about economy and longevity in my vehicles, but he wants raw power. I am not going to convince him otherwise. Similar gaps exist with housing, and other possesions. Not sure how to reach people on issues like this. Reality is that 'bling' and other ostentatious displays of wealth are still 'cool'.
Marc, Sufflok,VA,USA

Frankly, I thought it was a cretinous article. The aim of maximising individual welfare has been a core economic principle for hundreds of years so Dr Prescott is slightly behind on this discovery; in my experience very few people actually care about global warming and actively object to being lectured about it. Many people have said to me that they resent being blamed for slight fluctuations in the weather.
Tim, East Yorkshire

Given that we have been using cars as status symbols for so long I wonder when the green car industry will wise up and stop making green cars that are so ugly. With so many 1 and 2 people families around now an eco-sports car would seem to be a winner. I think getting people interested in Green is all down to design and we don't have enough designers thinking about it yet.
Heidi Mardon, Hamilton, New Zealand

the death of idealism occurred with the removal of the native americans in the colonial periods. the problem is because of technology; people dont need to rely on one another anymore setting the foundation for greed and wealth which is what the world is experiencing now. our pollution is what is causing global warming and our pollution is caused by greed. pollution takes time and money to clean up and both of which are resources that big business is not willing to give up. if it weren't for the regulations already set in place we humans would have most likely killed ourselves and our environment just to maximise profits. what does a corporation operate for? not to set a standard in the market or to help the community. they operate to make money the easiest way they know how and pollution is easier to release into the environment than inert waste. thank you
jeremy, savannah, USA

Its all well and good saying these things but maybe if the government said "ok car manufacturers we are putting in legislation to have cars ONLY do 60mph and have to do xyz to the gallon". Have all new houses have solar panals or wind turbines. Instead of bemoaning coal how about developing technology to caputre the CO'2 then GIVE that technology to the third world as they have vast resources of coal and oil which us westerners are saying dont use. Thus keeping them poor. Its our current society of worshiping the wrong people. Footballers singers actors. When we should be praising charity workers, enviromentalists (who do somthing) and scientists. I personally think that papers and television should stop showing celebs who do nothing for the environment people like pete doherty or the beckhams.
Andrew Giggal, Chesterfield

Fast cars and conspicuous consumption are definitely part of sexual display. But we females choose our males based on what we consider best for long term relationships and families. Girls, we need to tell the guys with the hot cars that they aren't husband material, and we aren't impressed by this behavior. We did it once, when we choose men who weren't going to kill each other in sword fights, we can do it again. Choosing the guys who protect the future, even for that one night stand, is promoting your own welfare.
Colleen Sudekum, San Francisco, CA USA

Saved the planet. Kill off all humans.
C Hemming, Ottawa, Canada

Living in excess has lead to the downfall of every great society. Unfortunately, this time we have more people than ever living some of the most excessive lifestyles we've ever seen. The very fact that I'm sitting here on the internet writing this is representative of this.
Matt L., Pennsylvania, USA

The parallel drawn with energy efficient light bulbs only works here because nothing is sacrificed, in fact, savings are made. The same will happen with cars - people will still want big and fast cars, but in future they'll be electric, so they can still get laid and we will still have a hope in hell of saving the planet. I think I agree with Ian from St. Louis in that we must work with our nature and that we need viable solutions, such as banning the bulb. So why is banning an inefficient bulb taking so long if it is only the first step and everyone agrees it should be banned?
Brendan Patrick, Glasgow, Scotland

Although a thought provoking and entertaining article your crude rationalisation between the environmental problematique and 'sexual competition' etc neglected more profound and systemtic roots of the problem; by that I mean the western worldview which is the set of values, concepts,ideas and principles handed down from one generation to the next and secondly the capitalistic-consumerist character of western society.
Shane McLoughlin,

It's quite evident that the prevalent attitude today is "Self, self, self". As for social responsibilities...pah! If only humanity wasn't so immature the world would be a better place.
Dave, Crewe, UK

A great deal of the market for consumer goods is created by marketing which sells us things we never previously conceived we could "need". And this is driven by a small minority of the wealthy and powerful, who don't pause to consider whether a product is a good thing. It reminds me of an episode of Dragons Den where the panel summarily rejected a water-saving device because they felt uncomfortable about working with a man with principles. 5 minutes later, they were busy competing to see who could buy a share of a company making a plastic puzzle toy in China and selling it at a handsome mark-up. These toys will no doubt end up in landfill in very short order. To paraphrase Mr Spock, "The greed of the few, or the one, outweighs the greed of the many."
Adrian Wilkins,

The world's problems are due to 'too many humans'. Until very recently, it took between 30 and 60 generations to double world population. Now, due to better health and sanitation our species can do this in one generation. The only answer is to curb fertility and achieve the reduction of our own numbers to a sustainable level.
Carolyne Kershaw, Liverpool UK

It's obvious that largely everything we do, civilisation itself is simply peacock feathers. Trying to change that would require a change in our genetic makeup. It's just not going to happen. Of course there is a simple solution. Make energy expensive. Make fossil fuel the source of most taxation. Get rid of or reduce income taxes. Tax things that are bad, not things that are good.
Colin Smith, Berlin, Deutschland

I think it's in Animal farm that the statement is said," All animals are equal, but some animals are more equal then others" In the end you can't buck natural instinct. Also I've heard it said that it would take another 3 Earths to support the Human Race. That's the major problem, there are to many of us.
John Russell, Luton, UK

I have noticed a slight shift in pop culture, it is now trendy to be "green". Unfortunately, businesses have seen this and now advertise their products as being environmentally friendly, when in reality they are not all that great. This requires the consumer to employ a higher level of inquiry into products. We are so roped into a consumptive path that it is difficult to invest in a purely practical sense in everything from cars to clothing.
Meg, Palo Alto,USA

I fully agree with Matt's article, which is why I am often not very optimistic about efforts to tackle global warming, let alone pollution, overfishing, species extinction, etc. As Gandhi once said, the planet has more than enough to meet man's needs, but it doesn't have nearly enough to satisfy his greed.
Jose Gonzalez, Makati, Philippines

I think this article misses one of the major problems in tackling things like climate change. And that is that the "solutions" currently offered represent pretty sizable reductions in standard of living. I and many people are willing to make changes in our lives to protect the environment - using less electricity, going to fluorescent bulbs, trying to reduce driving some, etc. But major changes are often just too major. The environmentalists tell me I should own a tiny car that gives me a backache when I drive more than 10 minutes and makes merging onto the highway a life threatening undertaking. And with all that it saves maybe 10 MPG. Sorry, but the tradeoff isn't worth it. They also tell me I should sit at home all the time and not fly, not go on a cruise, and not go on a road trip. Sorry, but traveling and seeing the world, other cultures, etc, is one of my passions. This all has NOTHING to do with being "sexy." It instead has to do with living an existence I consider fun and enlightening, not droll and boring. Trust me, the people driving minivans aren't doing it to attract a mate. They are doing it because they perceive an increase in standard of living. Until we find ways to tackle these problems that do not drastically change our way of life, I fear they will go largely un-tackled.
Jim, Blacksburg, VA, USA

This illustrates the fact that more money and a sucessful economy doesn't necessarily mean that there's anything worthwhile to spend it on. What's the point in having endless electronic gadgets when the price of a house with enough space to keep them in is still sky high, and having a garden of our own to stand in is rapidly becoming a pipe dream. Bottom line - too many humans in this world chasing limited resources
Andy R, Sheffield

I believe we can all adjust. Not just adjust in the sense that we simply don't buy a bigger car, more use the car 'we' have increasingly less, getting used to being a person rather than an image... have no shame to use public transport. I concurr... Work with nature, not against it. Ultimately we won't win. It's simply not possible.
Sam Barnes, Current Location: Vaniose, Near Tignes, Les Alpes.

Matt, please tell us how you plan to supply 1.1 billion people with a year's clean drinking water for only 90 cents per person. Having worked to do exactly that in Afghanistan and Iraq for the last three years, in the face of polluted ground water and changing weather patterns, I know a lot of people who would be excited to know exactly what you have to offer.
Ray Montgomery, Baghdad, Iraq

It seems to me that a good way of changing people's views on social responsibilities would be to change what we consider to be symbols of status or desirability. If having a wind turbine in your back yard was as appealing as a corvette, more people would pony-up the money and go green.
Peter, Omaha, USA

Good article. I've often thought the same thing myself. Despite our great achievments and our ability to manipulate our enviroment we are still animals and I feel we have lost our way in relation to dealing with the enviroment. I would even go so far as to say that some disease's that afflict us may be caused by the removal of ones enviroment. I don't think the global warming issue is as bad as it's been made out. We've probably sped it up but it's going to happen regardless and on a much larger scale then anything we can create. I think we as humans need to rethink the way we live and change fundamentally our attitude towards our planet, because despite what Star Trek and Star Wars might suggest, there's no way in hell were getting off this planet. The nearest inhabital planet would take at least ten generations of humanity to reach.
Ken McAlester, Dublin, Ireland

It's certainly true that you can't rely on the general public to back the big idea - the Apollo program cost less over the years than the amount of money spent on lipstick in the US, but it only went ahead because the government had decided it would. But to imply that we all buy cars to improve our sex lives is a bit far-fetched - I have only *ever* bought cars to get from A to B. Or am I the only one like this out there?
Peter, Newbury, UK

Good article, I agree to it.
Ramaa Devi, Mumbai, India

I agree with Matt in this sense: if humanity were only better, wiser, and more responsible, then all of our problems with war, poverty, and the environment could be solved. If only we were "better" then there would be no need for police, the military, or even government. Matt's suggestion is Utopian and given the immediate need for viable solutions we must abandon these absurd and counterproductive platitudes. You must work with our nature, not against it.
Ian, St Louis USA


Do you agree with Matt Prescott? Are we obsessed with status symbols and material wealth? Is the price of showing off too high? Can we learn to love ourselves and the planet?

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A series of thought-provoking environmental opinion pieces
Story from BBC NEWS:
http://news.bbc.co.uk/go/pr/fr/-/2/hi/science/nature/6900665.stm

Published: 2007/07/16 14:27:38 GMT

© BBC MMVII
 
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How are species classed as extinct?
WHO, WHAT, WHY?
The Magazine answers...



David Attenborough's long-beaked echidna has been found to be alive and well, despite fears it had become extinct. So how are species classified as dying out?
When extinct species are rediscovered they are, aptly, called Lazarus species. They include the New Zealand storm petrel and a freshwater fish from Madagascar called the rheocles sikorae, in recent years.

The long-beaked echidna, named after the famous naturalist, is not among them because its status was the category below, newly entitled "possibly extinct".


THE ANSWER
The World Conservation Network carries out detailed surveys of each species
Only 41,000 of 1.8m known species have been classified

That status will now have to be revised after villagers in Papua New Guinea told scientists from the Zoological Society of London they had sighted and eaten the echidna. And holes in the ground suggested the creature had been hunting worms.

The classifications are made by the World Conservation Union (IUCN) and documented on its Red List showing the conservation status of animals and plants.

Currently there are 844 extinctions, made up of 784 documented extinctions plus 60 species classed as extinct in the wild, but surviving in captivity.

The notion that extinction status is gained by a species not being sighted for 50 years is a myth, says Craig Hilton-Taylor, manager of the Red List Unit based in Oxford.


WHO, WHAT, WHY?
A regular part of the BBC News Magazine, Who, What, Why? aims to answer some of the questions behind the headlines

"The Red List is quite short because it takes a long time to accumulate enough evidence before we can say 'It's extinct.'"

A detailed survey has to be carried out in the species' natural habitat, and its findings reviewed every four or five years. It looks for either documented evidence of the animal or plant on the site or circumstantial evidence that it might be there, taking account of local opinions.

"To get a survey done in a remote area can be quite tricky and can take several years before we can finally say 'It's not there anymore,'" says Mr Hilton-Taylor.

"Sometimes one survey may be enough. We have to weigh up the balance of evidence. We need to be conservative about listing them as extinct and even the ones we have listed may then turn up again."

Habitats destroyed

Despite the odd species being rediscovered, the number extinct is going up slowly. But of major concern is the large quantity moving into the endangered or critically endangered category.

A review of the coral species, for instance, has 40% under threat, due to global warming and coral bleaching, says Mr Hilton-Taylor.

Habitat destruction is the biggest cause of extinction. Others include over-exploitation, alien species and pollution. The current overall extinction rate is about 100 to 1,000 times the natural, or background, extinction rate.


Persuading the public of the need to conserve ants, flies and cockroaches, well I can imagine their reaction
Craig Hilton-Taylor
World Conservation Union

Declaring a species extinct too soon has two downsides, says Jonathan Baillie, who was part of the Zoological Society London team that made the echidna breakthrough.

"One is that if it gets rediscovered then people find it hard to understand. We want to be pretty certain when declaring an extinction and if we declare it too soon then it doesn't receive the conservation attention and may be ignored just when conservation efforts are needed."

The 844 figure is a gross underestimate, he says, because we are only aware of about 10% of the planet's life, so many species are dying out that we're not aware of.

Furthermore, out of the 1.8 million species we are aware of, only 41,000 have so far been classified in conservation terms, says Mr Hilton-Taylor.


The vast bulk of the unclassified are invertebrates, which suffer from a bit of an image problem that makes getting funding for research difficult.

"To try to get donors excited about insects is hard and persuading the public of the need to conserve ants, flies and cockroaches, well I can imagine their reaction.

"But if you conserve the charismatic species, we should at the same time be capturing the less charismatic species, the ones most important for keeping the ecosystem going.

"For large mammals, you need large areas to conserve them, so there's a knock-on effect for other species."

Story from BBC NEWS:
http://news.bbc.co.uk/go/pr/fr/-/2/hi/uk_news/magazine/6901056.stm

Published: 2007/07/16 13:36:57 GMT

© BBC MMVII
 
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Milestone for unique bionic hand
A highly functional bionic hand which was invented by a Scottish NHS worker has gone on the market.
The thumb and fingers can move and grip just like a human hand and are controlled by the patient's mind and muscles.

It was invented by David Gow and was designed and built by Touch Bionics, which is based in Livingston.

The technology has been tested by a number of people, including US soldiers who lost limbs in the Iraq war.

Mr Gow, who is the director of rehabilitation engineering services at NHS Lothian, told the BBC's Good Morning Scotland programme: "It's the first hand to come to the market that's actually had bending fingers just like your own hand."


If you gave someone this hand for a month and then gave them back their old device, they would be very disappointed
Donald MacKillop
Bionic hand recipient

Donald MacKillop from Kilmarnock was one of the first people to be fitted with the bionic hand in 2006 and has been testing the new hand over the past few months.

The retired welder lost his right hand in an industrial accident almost 30 years ago.

Since then, he has tried a succession of artificial hands but none have come close to the latest version.

"The most important thing is the movement of the fingers, that's what really makes the difference," he said.


"The hand does feel like a replacement for my missing hand and it is now very natural for me to pick up all sorts of objects. It makes everyday activities much easier.

"If you gave someone this hand for a month and then gave them back their old device, they would be very disappointed."


Juan Arredondo, from Texas, who lost his hand in Iraq in 2004, has also been fitted with one of the hands.

"Every day I have the hand, it surprises me," he said.

"Now I can pick up a Styrofoam cup without crushing it. With my other hand, I would really have to concentrate on how much pressure I was putting on the cup."

Stuart Mead, chief executive at Touch Bionics, said: "We are delighted to be the company that moves bionic hand technology from the research and development phase into the real world, and to lead a generational advance in bionics and patient care.

"We have always existed to change the lives of patients with severe injuries and disabilities, and it is thrilling to feel that we are now able to accomplish that goal."

The hand was tested at the National Centre for Prosthetics at Strathclyde University.

Mr Gow, who works at a new state-of-the-art centre at the Astley Ainsley Hospital in Edinburgh, hopes the bionic hand could be available on the health service within two to five years.


Story from BBC NEWS:
http://news.bbc.co.uk/go/pr/fr/-/2/hi/uk_news/scotland/edinburgh_and_east/6901231.stm

Published: 2007/07/17 06:04:42 GMT

© BBC MMVII
 
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asim bhai neo bhai and adux this is for the music lovers including me.


Music players 'in lightning risk'
Doctors in Vancouver, Canada, have warned that people who wear portable media players during a storm could be putting themselves at risk.
In a letter to the New England Journal of Medicine, they describe burns and hearing damage suffered by a patient hit by lightning while using his iPod.

The man, who was jogging in a storm, suffered burns to his chest and on his leg where he was wearing the player.

Doctors say the man's sweat and metal earphones helped channel the current.

Medical experts say electronic devices, such as music players or mobile phones, on their own do not attract lightning.

But in the Vancouver man's case, "the combination of sweat and metal earphones directed the current to, and through, the patient's head," wrote Drs Eric J Heffernan, Peter L Munk and Luck J Louis of Vancouver General Hospital.

Burst eardrums

The man's jaw was broken, probably by muscle contraction, say the doctors.

The current of electricity through his headphones caused the air in his ears to heat and expand, creating pressure waves which burst his eardrums.

The extra jolt of electricity through the wires of the man's music player caused second-degree burns all the way down his chest and to his left leg.

In addition, witnesses reported the man being thrown about eight feet (2.4m) after the lightning hit him, the doctors said.

The incident, which happened two years ago, has left the man with less than 50% hearing in both ears.

Several other cases of people suffering burns and hearing loss after being struck by lightning while wearing personal stereos have also been recorded.

Story from BBC NEWS:
http://news.bbc.co.uk/go/pr/fr/-/2/hi/americas/6896530.stm

Published: 2007/07/12 21:26:16 GMT

© BBC MMVII
 
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Tests begin on Canaries telescope
Tests have begun on one of the world's largest optical telescopes, installed on a mountain in the Canary Islands.
Situated on a 2,400m-high (7,900ft) peak on the island of La Palma, the huge telescope consists of a mirror measuring 10.4m (34.1ft) in diameter.

The Spanish-led Great Canary Telescope (GTC) is extremely powerful and will be able to spot some of the faintest, most distant objects in the Universe.

The GTC team expect the telescope to be fully operational within 12 months.


It would be wonderful if this telescope allowed us to detect a planet like ours
Pedro Alvarez

The enormous array has taken seven years to construct; its installation has been hampered by poor weather and the logistical difficulties of transporting equipment to such an inaccessible location.

The project is estimated to cost 130m euros (£88m).

Another Earth?

Based at the Roque de los Muchachos Observatory, the optical telescope is made up from 36 separate hexagonal mirror segments which together form the 10.4m primary mirror.


Its vast size will enable it to capture some of the most distant light in the Universe, helping researchers look for information that might help to explain the evolution of the cosmos.

It will probe far-off galaxies, look into the secrets of star formation, and hunt for Earth-like planets.

"It would be wonderful if this telescope allowed us to detect a planet like ours," project director Pedro Alvarez told the Spanish El Mundo newspaper.

Campbell Warden, the executive secretary of the Canary Islands Astrophysics Institute, told BBC News: "The big advantage of the GCT over existing telescopes... is that because of the combination of the very advanced technology and the largest optical infrared mirror we'll be able to characterise the atmospheres of planets, instead of just having, as we have at the moment, mathematical speculations of what planets could be like.

"We'll actually be able to take a much better look at them."

He added: "We'll be able to throw back the curtains that shroud the early Universe, revealing many of its mysteries."

Giant telescopes

The GTC is among the world's largest optical reflecting telescopes.

The newly opened Southern African Large Telescope (Salt) boasts a segmented primary mirror with - in the longest dimension - a diameter of 11m (36ft).

The Hobby-Eberly on Mount Fowlkes in Texas, US, also has an 11m mirror; however, the way that it works means the Keck twins in Hawaii, which have mirrors 10m (33ft) across, have a slightly larger light-collecting area.


The twins can also be made to work in tandem - as a so-called interferometer - which allows them to mimic a larger telescope that is 85m (279ft) wide.

These US scopes are rivalled in power by Europe's own Very Large Telescope, sited in Chile, which includes four large mirror units (each 8.2m across) that will soon also be made to work as one.

When they do this, the VLT will mimic a telescope that is 200m (650ft) across.

The Large Binocular Telescope in Arizona, US, uses two 8.4m (27.6ft) mirrors side by side to achieve an effective 11.8m (38.7ft) diameter.

All of these scopes will be dwarfed in the next decade if plans are progressed to build facilities with mirrors that are 30-60m (100-200ft) across.

Story from BBC NEWS:
http://news.bbc.co.uk/go/pr/fr/-/2/hi/science/nature/6897293.stm

Published: 2007/07/14 00:13:22 GMT

© BBC MMVII
 
.
Butterfly shows evolution at work
Scientists say they have seen one of the fastest evolutionary changes ever observed in a species of butterfly.
The tropical blue moon butterfly has developed a way of fighting back against parasitic bacteria.

Six years ago, males accounted for just 1% of the blue moon population on two islands in the South Pacific.

But by last year, the butterflies had evolved a gene to keep the bacteria in check and male numbers were up to about 40% of the population.

Scientists believe the comeback is due to "suppressor" genes that control the Wolbachia bacteria that is passed down from the mother and kills the male embryos before they hatch.

"To my knowledge, this is the fastest evolutionary change that has ever been observed," said Sylvain Charlat, of University College London, UK, whose study appears in the journal Science.

Rapid natural selection

Gregory Hurst, a University College researcher who worked with Mr Charlat, added: "We usually think of natural selection as acting slowly, over hundreds of thousands of years.

"But the example in this study happened in the blink of the eye, in terms of evolutionary time, and is a remarkable thing to get to observe."

The team first documented the massive imbalance in the sex ratio of the blue moon butterfly ( Hypolimnas bolina ) on the Samoan islands of Savaii and Upolu in 2001.

In 2006, they started a new survey after an increase in reports of male sightings at Upolo.

They found that the numbers of male butterflies had either reached or were approaching those of females.

The researchers are not sure whether the gene that suppressed the parasite emerged from a mutation in the local population or whether it was introduced by migratory Southeast Asian butterflies in which the mutation already existed.

But they said that the repopulation of male butterflies illustrates rapid natural selection, a process in which traits that help a species survive become more prominent in a population.

"We're witnessing an evolutionary arms race between the parasite and the host. This strengthens the view that parasites can be major drivers in evolution," Mr Charlat said.

Story from BBC NEWS:
http://news.bbc.co.uk/go/pr/fr/-/2/hi/science/nature/6896753.stm

Published: 2007/07/12 23:18:22 GMT

© BBC MMVII
 
.
A GOOD ARTICLE


Butterfly unlocks evolution secret
By Julianna Kettlewell
BBC News science reporter



Why one species branches into two is a question that has haunted evolutionary biologists since Darwin.
Given our planet's rich biodiversity, "speciation" clearly happens regularly, but scientists cannot quite pinpoint the driving forces behind it.

Now, researchers studying a family of butterflies think they have witnessed a subtle process, which could be forcing a wedge between newly formed species.



A Russian-US team discovered that closely related species living in the same geographical space displayed unusually distinct wing markings.
These wing colours apparently evolved as a sort of "team strip", allowing butterflies to easily identify the species of a potential mate.


For me, this is a big discovery just because the system is very beautiful
Dr Nikolai Kandul, Harvard University

This process, called "reinforcement", prevents closely related species from interbreeding thus driving them further apart genetically and promoting speciation.
Although scientists have speculated about this mechanism for years, it has rarely been witnessed in nature.

"The phenomenon of reinforcement is one of the very few mechanisms that has natural selection playing a role in speciation," said Nikolai Kandul, who co-authored the Nature paper with Vladimir Lukhtanov and colleagues.

"It might be very widespread but it is hard to find good evidence of it," the Harvard University researcher added.

Geographical isolation

For speciation to occur, two branches of the same species must stop breeding with one another for long enough to grow apart genetically.

The most obvious way this can happen is through geographical isolation.


If a mountain range or river divides a population of animals for hundreds of generations, they might find that if they meet again they are no longer able to breed.
But geographical isolation is not enough to explain all speciation. Clearly, organisms do sometimes speciate even if there is no clear river or mountain separating them.

The other mechanism that can theoretically divide a species is "reproductive isolation". This occurs when organisms are not separated physically, but "choose" not to breed with each other thereby causing genetic isolation, which amounts to the same thing.

Reproductive isolation is much hazier and more difficult to pin down than geographic isolation, which is why biologists are so excited about this family of butterflies.

Butterfly clue

The Harvard team made the discovery while studying the butterfly genus Agrodiaetus , which has a wide ranging habitat in Asia.

The females are brown while the males exhibit a variety of wing colours ranging from silver and blue to brown.

Dr Kandul and his colleagues found that if closely related species of Agrodiaetus are geographically separate, they tend to look quite similar. That is to say, they do not display a distinctive "team strip".


But if similarly closely related species are living side-by-side, the researchers noticed, they frequently look strikingly different - their "teams" are clearly advertised.
This has the effect of discouraging inter-species mating, thus encouraging genetic isolation and species divergence.

"This butterfly study presents evidence that the differences in the male's wing colouration is stronger [when the species share a habitat] than [when they do not]," said the speciation expert Axel Meyer, from Konstanz University in Germany.

"This pattern would therefore support the interpretation that it was brought about by reinforcement, hence natural selection."

The reason evolution favours the emergence of a "team strip" in related species, or sub species, living side-by-side is that hybridisation is not usually a desirable thing.

Although many of the Agrodiaetus species are close enough genetically to breed, their hybrid offspring tend to be rather weedy and less likely to thrive.

Therefore natural selection will favour ways of distinguishing the species, which is why the clear markings exist.

"For me, this is a big discovery just because the system is very beautiful," said Dr Kandul. "As much as we can we are showing that [reinforcement] is the most likely mechanism."

This research was published in the latest edition of Nature magazine.


Story from BBC NEWS:
http://news.bbc.co.uk/go/pr/fr/-/2/hi/science/nature/4708459.stm

Published: 2005/07/24 11:19:20 GMT

© BBC MMVII
 
.
London's small but relentless dip
By Jonathan Amos
Science reporter, BBC News



A new assessment of land and sea level changes in London and the Thames estuary has been made by scientists.
Their study - based on tide gauge, GPS, gravity, and satellite measurements - shows a general pattern of subsidence of 1-2mm a year.

With waters rising in the region by about 1mm a year, the combined effect is a 2-3mm a year rise in sea level with respect to the land.

The study has been conducted for the Environment Agency.


Monitoring of the estuary will give us a really good understanding of the likely trajectory in terms of risk
Owen Tarrant, Environment Agency

The information is critical to the planning of London's sea defences in the face of climate-driven ocean rise. The region is home to 1.3 million people and has a property value put at more than £80bn.
These numbers are set to increase substantially as the capital, together with the estuary counties of Kent and Essex, look to expand development ahead of, and beyond, the 2012 Olympics.

The 300km of tidal defences including embankments, walls, gates and barriers will, at some stage, have to be adapted or moved, or new types of defences created that make better use of the natural floodplain.


London's key defensive installation, the Thames Barrier at Woolwich, also faces upgrading.
The new housing and business developments in the tidal floodplain, behind those defences, are also challenged to be located, designed and built to manage the increasing risk of flooding.

Engineers would like to know where improvements should be prioritised and on what timescale. "Monitoring of the estuary will give us a really good understanding of the likely trajectory in terms of risk," said Owen Tarrant, from the Environment Agency's TE2100 Project.

"The way that risk evolves through the century will not only affect the timing of the implementation of the options, but it will also affect the identification of the preferred options," he told BBC News.


Finer scale

The new assessment of land and sea level changes has been led by Dr Richard Bingley, from the Institute of Engineering Surveying & Space Geodesy at the University of Nottingham.

He has recruited researchers from a range of institutions and disciplines.

The team's intention has been to draw together data sets from different measurement approaches, to get a fuller picture of how the Thames region is moving over time.


Dr Bingley's own area of expertise is with the UK's scientific Global Positioning System (GPS) stations, which can, after much processing and analysis, sense millimetric changes in land movement.
Their data has been combined with readings from the absolute gravimeters run by the Proudman Oceanographic Laboratory to give detailed point trends. And this information has then been further combined with an InSAR analysis by Nigel Press Associates (NPA) of radar measurements from Europe's Envisat and ERS satellites.

The result is a broad picture of land deformation across the Thames region as whole.

The investigation confirms geologic studies that show the Earth's crust is still responding to the loss of the heavy ice sheet which covered much of Britain more than 10,000 years ago - with southeast England, including London, slowly sinking.

"Britain as a whole was already quite well understood," explained Dr Bingley. "We knew the north was rising and the south was subsiding; but without the work we've done we'd only have had a single figure for the Thames Estuary.

"Through the use of InSAR we can extrapolate from a few scattered GPS stations to almost a million points spread throughout the region so we see things on a much finer scale; we can show domains of movement and how - in some respects - they are restricted to quite close to the estuary, but of course that's where the flood defences are going to be."


INTERFEROMETRIC SYNTHETIC APERTURE RADAR (InSAR)
1. Envisat beams radar signal to Earth. Analysis relies on an InSAR variant known as Persistent Scatterer Interferometry
2. Persistent scatterers are typically roofs, metal & concrete objects. They can be consistently identified on a sequence of images
3. Comparing the changed components of the return signals - the 'phase shift' - from many passes reveals the land movement

Change is relative to start of European satellite data archive (1991)


The land subsidence - of the order of one or two millimetres per year - has to be combined with the measurements taken by tide gauges to give a true picture of sea level rise. Dr Bingley and colleagues have now done this for the Thames - and it equates to a year-on-year 2-3mm increase.

The new maps of land movement have been analysed by geologists to assess which rocks and sediments are likely to experience further descent. Some are relatively easily explained, such as the continued settlement of recent, or Holocene, deposits that line the river.

Some dips relate to water extraction by pumping stations, and it is even possible to see the settlement of land above underground construction projects such as the Jubilee Tube line extension and an electricity tunnel between Battersea and Putney.

But there are also some surprises, with a land rise evident in particular around Northolt in the northwest of London.

"London lies at the junction of three deeply-buried geological terrains," explained Dr Don Aldiss from the British Geological Survey.


"In the northwest, deep under Northolt, is part of what we call the Midlands Microcraton. These are among the oldest rocks in England. The uplift around Northolt is not massive - less than half a millimetre per year - but it's real. It seems to be some kind of edge effect or bulging where the rocks from the south meet the microcraton."
Tracing the millimetric trend in land movement has been an extremely challenging task, especially given the far larger day-to-day movements that can occur.

London itself will rock by 10mm, twice a day, with loading from ocean tides. The seasons also alternately load and unload the ground, making the Earth's crust "breathe" up and down over a longer period.

All of these confounding variables have to be taken into account - something that has proved especially testing when using GPS to sense millimetric changes in land movement.

"Within the GPS data you have to model loading effects and also account for atmospheric effects on the GPS signals. We have done this and have not only reduced the errors, but we now understand better what's in those error bars," explained Dr Norman Teferle from the University of Nottingham.

The full scientific report (including the images presented here) has been published as Defra/Environment Agency Joint R&D FCERM Programme R&D Technical Report FD2319/TR and can be downloaded from the Defra/EA Joint R&D FCERM Programme website (see internet links).


HOW LONDON'S DEFENCES HAVE RESPONDED TO RISING WATERS
1. Lowest section of wall constructed as a result of 1879 Flood Act
2. Update to Flood Act before end of 19th Century raised wall further
3. 1928 flood and subsequent 1930 Flood Act lifted defences again
4. Interim addition after 1953 flood while Thames Barrier was built



Jonathan.Amos-INTERNET@bbc.co.uk

Story from BBC NEWS:
http://news.bbc.co.uk/go/pr/fr/-/2/hi/science/nature/6231334.stm

Published: 2007/07/12 21:05:27 GMT

© BBC MMVII
 
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How to turn Gordon Brown green

VIEWPOINT
Stephen Hale


Gordon Brown's environmental record as chancellor was far from impressive, argues Stephen Hale in this week's Green Room. As the UK's new prime minister settles into life at 10 Downing Street, Mr Hale offers some tips to help Mr Brown become a little more green.


Gordon Brown must focus, sooner rather than later, on the far more radical actions needed to get Britain on a path to a low-carbon economy


Brown is definitely not the new green. The new prime minister has a very steep hill to climb to restore the public's faith in the Labour government's commitment to the environment.
As chancellor, Gordon Brown constantly blocked new environmental policy and championed environmentally disastrous approaches to aviation and planning.

He did belatedly focus on the environment, in response to the recent high profile of climate change and other environmental issues.

But he had remarkably little to say on the environment during the pseudo leadership campaign.

Other than a recycled eco-towns announcement, one of his few comments came during his acceptance speech, in which he declared that: "We want all individuals and all businesses to join us and build a shared national purpose to make Britain a world leader in tackling climate change."

I'm afraid we need a little more detail than that, Gordon.

The most interesting feature of the campaign was the Climate Change Forum, a private gathering of 100 senior figures from the private and voluntary sectors, at which the prime minister spent an afternoon in discussion on domestic policy, civil society mobilisation and international action. By doing so he has raised expectations among an influential group.

Green tips

Now he has reached Number 10, I want him to succeed - for all our sakes. So I'm breaking the habit of a lifetime and offering him five pieces of advice for free.


Gordon Brown's challenge is... to secure a global agreement that limits global climate change to 2C


In one area, he should pick up where Tony Blair left off, by focusing on securing an international breakthrough on climate change.

The outcome of this year's G8 summit in Germany was an important step forward, a thawing in the glacial atmosphere of global climate change talks.

Mr Blair can't be faulted for the energy he threw into this cause. But Gordon Brown's challenge is immensely greater: to secure a global agreement that limits global climate change to 2C (3.6F). This must be his number one priority. By comparison, nothing else really matters.

International leadership cannot be sustained unless it is matched by delivery at home. The proposed Climate Change Bill will make Labour's emissions targets a legal duty. But existing policies in energy, transport and housing will not deliver them, and there is pressure to go further.


It would be embarrassing to rip up June's Energy White Paper at this point. But Gordon Brown must focus, sooner rather than later, on the far more radical actions needed to get Britain on a path to a low-carbon economy.

My third tip is simple. The planning white paper should be ripped up right now. It is anti-democratic, incompatible with the Climate Change Bill and a potential catastrophe for our countryside. Embarrassing I know. But the later it is left, the worse the climb-down will be.

The next piece of advice is more palatable. Gordon keeps telling us that he would like us all to do our bit to reduce emissions. Many of us couldn't agree more. But right now it's often just too difficult and expensive. Mr Brown needs to help us.

Transport, energy, housing and other policies need to be reviewed to make the green choice for individuals the natural choice.

Finally, Gordon Brown should reassure the sceptics by doing something impressive, and fast. Right now, most of us do not think he's serious about the environment. We need a reason to doubt that.

One simple move would be to finalise a marine bill for this year's Queen's Speech before the Conservatives launch a campaign to force him to do so.

Great expectations

Does Gordon want good green advice? His record before he crossed the threshold of Number 10 does not leave much room for optimism.


But the past is not necessarily a good predictor of the future, and there was much to welcome in his speech to Green Alliance in March.

The Cabinet reshuffle has not filled me with confidence though. David Miliband will no doubt maintain his environmental evangelism at the Foreign Office, Ruth Kelly should carry her growing commitment to the transport portfolio, and Hilary Benn goes to Defra with a strong personal commitment.

But three politicians with no apparent interest in the environment have been given top domestic positions: Alistair Darling (Treasury), John Hutton (Business, Enterprise and Regulatory Reform) and Hazel Blears (Communities and Local Government).

The new prime minister presents himself as a man of substance. This government has made plenty of green promises. Now it's time to deliver. Go on, Gordon, confound our expectations.

Green Alliance will publish a collection of open letters to Mr Brown later this month, from the leaders of environmental and other charities, business chiefs, the former England goalkeeper David James and other celebrities from the world of music. Maybe he will listen to them.


Stephen Hale is director of the Green Alliance, an environmental policy think-tank

The Green Room, now published on Mondays, is a series of opinion pieces on environmental topics running weekly on the BBC News website



Do you agree with Stephen Hale? Is Gordon Brown, as prime minister, going to overlook environmental issues? Does the government need to change its current policies in order to deliver its carbon cuts?
Dave James to the rescue eh? I'll sleep better at night now, that's for sure!
Alex Ross, Shipley, England

Stephan is right on the money. Affordable housing is a hugely important issue but this should be seen as an opportunity to develop new, efficient, well insulated, water and energy saving housing that complements the environment, rather than detracts from it. This doesn't have to be expensive, it's often just a case of applying foresight, good design and intelligence .

If dense housing is the answer then it should be done in a way that allows for recycling, composting and makes provision for shared green space that's good for growing. Housing needs to be integrated with work and transport - it should be easy to get to amenities, shops and work places by foot, bike, bus and train and not force people to rely on cars.

I'd like to know why this isn't obvious to everybody and at the top of political agendas.
Tim Lewis, Horsham

Clearly Mr Hale is one of a growing army of people who now make a good living from the globalised eco-industry. It would be interesting to know more about who funds the 'green alliance.' Until then the rest of us will try to make a living by more productive activities and pray that Mr Hale's view of Gordon Brown is correct - hopefully there will be a brake on ecochondriac policies before the last factory moves to China.
John, England

Gordon Brown, clearly, doesn't give a damn for the environment - he's spent the last ten years "massaging2 his city mates, but, then, find me a politician who does really care!!
Richard Crowley, Shropshire

"Gordon Brown is not proving himself to be a green minister with this first draft programme. The Climate Change Bill is without doubt a key bill for the environment, but protection of our seas and its resources such as fish stocks are key to improving our resilience and ability to respond to climate change and the Marine Bill has a vital role to play
Samantha Fanshawe Marine Conservation Society, Ross-on-Wye, UK

The greatest action that he could take is to drive through a plan to massive expand the nuclear power industry in the UK. Similtaneous with this the closure of all coal and oil fired power stations would do more than any other thing in combatting climate change. Buying low energy light bulbs, driving smaller cars, taxing air travel are all individually laudable, but amount to a fraction of the saving available if we embraced cheap, clean,and renewable nuclear power.
Paul Owens, N ovato, CA - USA


A series of thought-provoking environmental opinion pieces
Story from BBC NEWS:
http://news.bbc.co.uk/go/pr/fr/-/2/hi/science/nature/6277596.stm

Published: 2007/07/10 10:31:26 GMT

© BBC MMVII
 
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New hope over 'extinct' echidna
A species of egg-laying mammal, named after TV naturalist Sir David Attenborough, is not extinct as was previously thought, say scientists.
On a recent visit to Papua's Cyclops Mountains, researchers uncovered burrows and tracks made by the Attenborough's long-beaked echidna.

The species is only known to biologists through a specimen from 1961, which is housed in a museum in the Netherlands.

The team will return to Papua next year to find and photograph the creature.

The month-long expedition by scientists from the Zoological Society of London (ZSL) involved travelling to parts of the mountain range, covered by thick jungle, which had remained unexplored for more than 45 years.

Lone specimen

Jonathan Baillie, ZSL's Evolutionarily Distinct and Globally Endangered (Edge) programme manager, said: "We hope that Sir David Attenborough will be delighted to hear that his namesake species is still surviving in the wilds of the Papaun jungle."


The creature had not been recorded since a Dutch botanist collected the only known specimen in the cloud forest of the Cyclops Mountains in 1961.
As a result, it was widely assumed that the shoe box-sized species (Zaglossus attenboroughi) was extinct.

But while the Edge team were in the area, they spoke to local tribespeople who said that they had seen the creature as recently as 2005.

The scientists also discovered "nose pokes", holes in the ground made by the echidnas as they stuck their long noses into soil to feed.

In the programme's blog, Dr Baillie wrote: "Attenborough's echidna is one of five monotremes (egg-laying mammals) that first inhabited the Earth around the time of the dinosaurs.


"This group includes the duck-billed platypus, which helps demonstrate how different these are from all other mammals."

Very little is known about the animal's ecology. It is thought that it is nocturnal, foraging for earthworms among the forest litter, then spending the day resting in shallow burrows or hollow logs.

When threatened, it is believed the solitary living echidna erects its spine-covered coat to protect it from predators.

The team is planning to return to the Cyclops Mountains next year to carry out further research and to also install camera traps in order to photograph a living Attenborough's long-beaked echidna.


Story from BBC NEWS:
http://news.bbc.co.uk/go/pr/fr/-/2/hi/science/nature/6897977.stm

Published: 2007/07/15 23:30:06 GMT

© BBC MMVII
 
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