Got to pondering this evening the incredible present over a mere 2 million years.
Let us stop at 2,000,000 to enquire why we believe we know.
I was not there when nothing of import and human being arose in the past, only in April on the 7th day am I 68.
We learned to knapp stones, make sharp things. Learned how to throw spears. Learned how to thresh and flense. It appears we focused on smaller and smaller bits of the world, until we ultimately seemed to focus on the very very small things. In this way we have killed off ourselves, because only the original owner operator of the world was meant to fuck with the very very tiny things that go on inside creatures. No wonder our heads got so big.