Some monkeys reuse and recycle stone tools – others don’t Nature Picture Library / Alamy Stock Photo
Groups of monkeys living on two neighbouring islands in South-East Asia may have different cultural traditions. Both groups use stone tools, but the monkeys in one group regularly reuse them, while the other monkeys discard them – for no apparent reason.
On islands off the coast of Thailand, long-tailed macaques collect shellfish along the coasts, then use stone tools to crack them open. The macaques are one of only four primate species known to use stone tools, says Lydia Luncz of the University of…
