Ancient chinese script of sky (天 tian) on oracle bone:

circle B:
https://encrypted-tbn0.gstatic.com/i...2i9kw&usqp=CAU
Mexico
MEXICO CITY—Archaeologists in southern Mexico announced Monday they have discovered a 2,700-year-old tomb of a dignitary inside a pyramid that may be the oldest such burial documented in Mesoamerica.
https://www.thestar.com/news/world/2...rn_mexico.html
PIE culture on mesomaerica:
"The vajra in South American cultures
In the new world we encounter a similar deadly lightning weapon used by the sky gods. In the Aztec culture there is the god Huitzilopochtli. Huitzilopochtli, with his weapon Xiuhcoatl, “ the fire serpent ”, killed his sister Coyolxauhqui soon after he was born. The Mayan rain deity Chaac and the later Aztec Tlaloc are both depicted carrying their lightning axe (Figure 6.). Sometimes they are depicted holding snakes, which represent lightning bolts, which they would hurl from the mountaintops where they made their retreat. In Peru, we find the god Illapa who is described as a man wielding a club in his left hand and a sling in his right."
so Kozintsev's opinion is plausible.
"Unlike the previously outlined Scenario 1, which placed the IE,
Uralic and Indo-Uralic homelands in the area east of the Caspian
Sea, not far from the presumed common Eurasiatic homeland,
Scenario 2 locates the latter in a much more easterly area
between Lake Balkhash and the Altai. With regard to proto-IE,
Scenario 2 is an extension of Scenario 1 back in time and space,
adding a very long initial stretch of the westward expansion of
Indo-Hittite across most of western Central Asia"
"In line with johanna nichols’ early view (1997, 1998), i postulated the primary westward spread of ie from that locus, caused by the transition of one of the early farming groups to seminomadic pastoralism. the spread, however, likely occurred, not by two routes (the northern one to the western steppe, the southern to the near east),but only by the southern mountainous route along the elburz. an additional fact supporting this scenario is that, judging by reconstructed PIE terms for topographical features, the indo-hittites, at some stage of their history, lived in a mountainous terrain, moreover, that the mountain was perceived as a “mighty cliff reaching to the sky”; in addition, there was a sea or large lake nearby (gamkrelidze, ivanov 1995: 574–577; dybo 2013). as the authors conclude, this eliminates the steppe as a primary homeland."
According to Igor V. Kovtun
At the same time, the indirect influence ofthe Okunev cultural corpus on the formationof the proto-mythopoetic tradition of the earlyIndo-Aryans of the Seima-Turbino era, whichwas embodied in the quoted Vedic texts aftermore than a millennium, is not excluded.