Lithuanian is a VERY young language. Only 1000 years old! Split between Latvia and Lithuanian (from proto-Baltic, then proto-Western Baltic) was only 1000 years ago. It is also heavily mixed with Finno-Ugric (Mongoloid). Nothing special about it.
First we got frist stage PIE around the Iranian Plateau,
then second stage of PIE in Yamnaya Horizon,
then proto-Balto-Slavic,
then proto-Baltic,
then proto-Western Baltic
then proto-Lithuanian,
then modern Lithuanian
http://www.sci-news.com/otherscienc...s-originated-pontic-caspian-steppe-02516.html
Lithuanian is so similar to the reconstructed PIE that you can't call it a "young" language. It was historically attested late, but it's basic forms have been spoken since PIE itself.
All of your great looking trees don't change this or the similarities to Sanskrit.
And the oldest IE Language is certainly Anatolian, not your fantasy PIE/Iranian on the Iranian Plateau.
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