There is now a simple scientific explanation
for all the differences between humans and chimpanzees:
Humans evolved from marine chimpanzees ('aquatic apes')
that were isolated on Bioko Island (the "Galapagos" of human evolution)
Mammal fossils—found only in dry parts of Africa—do not actually show where humans evolved
Read this peer-reviewed paper, published in the scientific journal
Ideas in Ecology and Evolution (2020):
A paradigm for the evolution of human features: apes trapped on barren volcanic islands
by Allan Krill, professor of geology
Watch: Elaine Morgan's TED-talk (2009)
Aquatic-ape books and talks by Elaine Morgan
Book: The Naked Darwinist
Left: Paal Aagaard and Allan Krill present some of their research in 2018.
Center: An aquatic ape in Trondheims fjord.
(YouTube)
Right: An 'aquatic ape' reads his Bioko paper.
(YouTube)
See also: Paleohuman.com