I am a bit confused, the old memory not what it used to was, I meant the Third Chimpanzee by Jared Diamond which supports the unorthodox notion that gorillas and chimps descended from a human like ancestor.
Also The Monkey Puzzle and the First Chimpanzee (lol) by John Gribbin and Jeremy Cherfas also discusses the same theory.
There is considerable molecular evidence to support this.
Thanks for clearing that up!
There is a considerable difference between "human like" and the genus
Homo. But I can understand the confusion.
Yes, the earliest apes and the last shared common ancestor with chimps and humans, moved upright in the trees, more orangs and Gibbons, than either gorillas or chimps do.
Thus they were more like us than them... gorillas and chimps indignantly evolved knuckle walking during their evolution away from their respective shared ancestors with us. There is a common misconseption that Chimps are "more primitive" than we are, or that they are supposed to be our ancestors. The truth is, they as modern as we are and had their own evolutionary path from our last shared ancestor.
The fun thing is this means we were essentially pre-adapted for bipedal walking.
wa:do