Here's a good one where you get humanoid and non humanoid species growing the tree of life, it's an older version of the other one I posted-
https://allthatsinteresting.com/thum...kai-relief.jpg
https://en.wikipedia.org/wiki/Tree_of_life
How did ancient civilizations have this knowledge?
This is what your average Sumerian looked like also-
https://en.wikipedia.org/wiki/Sumer#...d_of_Gudea.jpg
Does that look anything like the authority figures growing the tree of life?
Worshiping the tree of life implies an understanding of DNA. You can see in the artwork the tree is built to actually look like the 12 strands of DNA intersecting.
https://www.annunaki.org/wp-content/...-the-bible.jpg
https://encrypted-tbn0.gstatic.com/i...N_3YzSpNjAvw&s
https://previews.123rf.com/images/le...-dna-shape.jpg