Female chimpanzees that forge strong, grooming-rich friendships with other females dramatically boost their infants’ odds of making it past the perilous first year—no kin required. Three decades of ...

At some point in your life you might have seen animals groom each other. This is something very common in chimpanzees, for example. Thanks to decades of work by primatologist Dr. Richard Wrangham and ...

1. Introduction -- Levels of study -- Human uniqueness -- Palaeoculture -- 2. Definition -- Checklists -- Beyond behaviour -- Essentials -- The way we do things -- 3 ...