indians date it quite securely via astronomical observations in the texts of dhruva the pole star to 3000 BC or 5kya
dhruva was thuban or alpha draconis of draco or the indian constellation sisumara whale dolphin
there were no pole stars from about 2300 BC to 1500 AD but the knowledge of the previous one was preserved in india
the rig veda and some other vedas even predate the dhruva observation but have not been securely dated
Please post a credible source for whole of your post.
http://www.academia.edu/7193503/Dhruva-the-Ancient-Vedic-Hin...
https://www.researchgate.net/profile/RN_Iyengar
personally dont care about peer review status since we know the reasons westerners reject this information has nothing to do with science but self interest
but you might be interested to know it was first proposed by a european named jacobi before europeans got the desire to be aryan leading to the world war and destruction
video lecture
https://www.youtube.com/watch?v=5R2lXuUMdoo
another person same conclusion
and actual science will head back east to india and maybe china if they can get their act together
this was not noted in the paper itself but only on twitter
you can imagine the ridiculousness of claims that women drove out dravidians and then installed a patriarchy
i hope they do publish cause it would mark the low point of western science future historians can point to as the beginning of the fall
in any case they have no evidence of steppe languages only inferences and we have strong evidence of sanskrit in india 3000 BC well before the fake aryan invasion claims of 1500 BC
The "even older Dravidian [language]" referred to in the article is not exactly Tamil. The oldest written evidence we have for Old Tamil[1] dates to the 3rd century BC[2]. But we're told that this word is in Sanskrit's vocabulary, which was already developed well before then. (Some people date the Vedas to the 15th century BC.)
That means it probably didn't come from Tamil, and instead came from some other, older Dravidian language. That might be Proto-Dravidian, the common ancestor of all Dravidian languages (Tamil, Malayalam, Kannada, Telugu, etc.), or some other ancient Dravidian language that we don't have a record of.
(That seems likely, because that's generally how other Dravidian words in Sanskrit are thought to have gotten there: Skt. फल (phala) 'fruit' is thought to have been borrowed from Proto-Dravidian *palam, which has descended into Tamil பழம் (paḻam), Malayalam പഴം (paḻaṃ), etc.)
Some English words actually are directly from Tamil, though. Curry[3] and mango[4] are both directly from Tamil.
[1]: Old Tamil is actually quite different from Modern Tamil, but let's not get into that
[2]: https://en.wikipedia.org/wiki/Old_Tamil_language
[3]: https://en.wiktionary.org/wiki/curry#Etymology_1
[4]: https://en.wiktionary.org/wiki/mango#Etymology