Page "Common chimpanzee" Paragraph 7

According to Richard Dawkins in his book The Ancestor's Tale, chimps and bonobos may be descended from Australopithecus.

Gracile-type species, in other words, the ancestors of chimpanzees, would be some of the Australopithecus afarensis.

Chimpanzees were amongst the animals affected during the Toba eruption, hinting that Toba ash extended far west as Africa.