This is history porn at its finest.
“Comparing the sequences of humans, chimpanzees and gorillas has enabled scientists to put a more accurate clock on when the three species split from their last common ancestors. It was traditionally thought that the emergence of new species (known as “speciation”) happens at a relatively localised point in time but emerging evidence suggests that this is not necessarily the case, that species split over an extended period. Studying the gorilla genome suggests that the divergence of gorillas from the common ancestor of humans and chimpanzees happened around 10 million years ago. Humans and chimpanzees last shared a common ancestor around 6 million years ago. Eastern and western gorillas split some time in the last million years.”