I know my sorces are various sites from the internet....Of coarse I wont go to some library in India and start doing reseasrch there?? ONce again, I you are misunderstanding them....I dot mean that our civilization is the greatest..No body knows....may be Chinese were better or may be Africans or Maya or may be Atlantics.... I was just trying to show the relation of my religion with the explanation of the universe which we cannot find in other religion...I dont mean that our people knew everything 5000 years ago....but this is for sure that our civilization knew 100 times more about the universe and solarsystem than any other civilization at that time...