tell me, has "old india" had any intellectual revolution like the "islamic golden age" or the european renaissance/industrial-revolution or the russian revolution of 1917??
can you show me one one metal mechanical machine from "old india"??
this is a "noria" water-wheel in syria, built hundreds of years ago and still in working condition, though the design is from still older times...
so the native indian tribes ( central indian, dravidan and perhaps tibetan ) just welcomed the aryans with open arms and roses and saffron petals??
kancha ilaiah will want to differ with you.
how??