Hominins reached Asia at least 2.1 million years ago, researchers assert in an 11 July Nature paper. Stone tools they found in central China represent the earliest known evidence of humans or their ancient relatives living outside Africa. Image: Prof. Zhaoyu Zhu
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Another non-human primate has entered the Stone Age – the fourth type known to have done so. One population of white-faced capuchins living in Panama routinely use stones to smash open nuts and shellfish. Image: Tony Nastase Photography
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The macaques of southern Thailand have started a new tradition. For at least a century, they have used simple stone tools to smash open shellfish on the seashore. Now the monkeys have begun using stones to crack open oil palm nuts further inland. Image: mcoughlin
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