Has anyone postulated a good theory as to why Homo Sapiens arose in Africa but there were never equivalent (maybe raccoon descended) intelligence-niche species in the new world?
-
-
This Tweet is unavailable.
-
It probably helped that human ancestors were omnivores in a complex, challenging environment. Bipedalism, opposable thumbs, cooperative social arrangements and a few big-brain mutations started the feedback loop.
End of conversation
-
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.