you only remember half things..do you know who was Al-beruni, he was traveller into India, and he openly admitted india's superiority in these fields, most of things such as earth's perimeter and acceleration were actually known to Indians and people like Al-Beruni learned it from Indians. Funniest part is that while if you read Al-Beruni ,he openly admits it, but only people like you twist the fact and say ...muslims knew several hundered years ago... My dear friends, they learned from Indians who knew this since thousand years ago
