Are Vedas ultimate answers to physics?

I take some of these evidences with a healthy dose of salt. The last(?) of the eighteen puranas is the Brahmanda Purana. It describes that there was a golden egg from which the universe was born. The immediate conclusion is that our ancients knew about the Big Bang. That the rest of the purana describes various gods, goddesses and miracles is conveniently ignored.
I have read a research paper published many years back by a Hindu historian that gives evidence that sling shots were the deadliest weapons available at the time of Mahabharata.
The pushpaha Vimana is considered to be an anti gravity aircraft. Sometimes we tend to glorify our ancients without justification. We can be justly proud of the calculus kind mathematics and involved celestial mechanical calculations Indians did in the recent (1000 BC onwards). Uncanny accuracy of prediction of eclipses contrast with the blind assertions of astrology. Tremendous advances in internal medicine and surgery coexisted with black magic and quackery.

While I tend to discount much of the so called advanced science in the vedas, I also wonder why we lost track of the real advances in maths and medicine that were more recent. Probably India also had its own dark ages.

I also wonder why we lost track of the real advances in maths and medicine that were more recent.

May be , because India demolished again and again over period of time.
If we believe (as we don't have written evidence),at that time, our country was most developed while rest of world is just trying to capture more and more area of earth to get rich.
Due to numerous demolition of country over time to time we lost our science (written proof) , what science wants.
take a single example , If Nalanda was not burnt, probably we would have biggest source of knowledge in the world.
Almost everything what stated in Mahabharata and Ramayana is coming to reality from flying boat(airplane) , Agnibana(missile), Ramsetu(bridge over see), Sanjay Dristi (ability to see things remotely) ....