Primate memory
Tetsuro Matsuzawa writes: The most recent common ancestor of chimpanzees and humans lived between five and seven million years ago. This shared heritage became evident when sequencing revealed a 1.2% DNA difference between species. Chimpanzees have a living sister species, bonobos, that is equally closely related to humans. Both chimpanzees and bonobos are found only in Africa; this is also true of gorillas. Chimpanzees and humans shared a common ancestor with gorillas between eight and nine million years ago. Another…