For the first time ever, an international team of primatologists has witnessed the spread of a new tool-use behavior in a wild population of chimpanzees. Young female of the Sonso chimp community using a moss-sponge – a behavior she learned by observing her mother. Image credit: Catherine Hobaiter. Chimps are widely considered as the most ‘cultural’ of all non-human animals, with 39 socially acquired behaviors, including tool usage, grooming...
