This one has a lot of interesting links, there's also a separate series by the same man (you don't have to buy anything, just click "view full report")
and this one:
You will probably want to read every article on both of the above pages.
They also knew what "dark matter" was, the stuff that scientists are trying to wrap their heads around, now. They said that the universe of the dark-matter can be combined in a certain way with the light universe (this universe) to bring forth new creation. The old story goes something like the dark was split in two, and created light and the remnant darkness, as well ... and that the deep was tapped for the creation of all things. REALLY fascinating.
... there's even a few paragraphs in the Rig Veda that describes exactly how to make a battery and to induce the electrolysis of water ... Brown's gas :
The Agastya Samhita, an ancient Indian text, gives directions on how to make a battery: "Place a well-cleaned copper plate in an earthenware vessel. Cover it first by copper sulfate and then moist sawdust. After that put a mercury-amalgamated-zinc sheet on top of an energy known by the twin name of Mitra-Varuna. Water will be split by this current into Pranavayu and Udanavayu. A chain of one hundred jars is said to give a very active and effective force." By the way, Mitra-Varuna is now called cathode-anode, and Pranavayu and Udanavayu are to us oxygen and hydrogen, respectively.
The hymn 1.50 of the Rigveda on the Sun, says
[O Sun] you who traverse 2,202 yojanas in half a nimesa. The usual
meaning of yojana is about 9 miles as in the Artha shastra and for nimesha.
The measures of time are thus defined in the Puranas:
15 nimesa = 1 kastha
30kastha= 1 kala
30 kala = 1 muhurta
30 muhurta = 1 day-and-night
A nimesa is therefore equal to 16/75 seconds.
That ratio equals out to about 189,500 miles per second.
It does come very close to the correct figure of 186,200 miles per second... and we don't know the precise measurements used by the ancients, so we could possibly figure that the discrepancy in the two numbers is the result of histological error.