They say that one should always aim for the stars, if you fail, you'll land on the moon.. Or at least you will get some stardust in your eyes!
Considering that our ancestors probably never left the confines of the Earth, why did they decide to take a long shot at the subject so out of bound as Cosmology? What is cosmology?
Wikipedia defines it as:
"Physical cosmology is the scientific study of the universe's origin, its large-scale structures and dynamics, and its ultimate fate. Religious cosmology is based on mythological, religious literature etc. and theories in cosmology may include both scientific and non-scientific propositions, that cannot be tested."
But the ancient Indians not only studied astronomy, but also provided theories on the universe's birth, it's age and whether it will die eventually or keep going on and on. And ancient Indian civilization was really the ONLY culture that came up with a pretty close description of the known universe that matches the observations and theories of modern science.