It’s no secret that parrots are smart. Aside from mimicking human speech, they display some impressive problem-solving abilities. But unlike other brainy birds such as crows, they’re not regular tool ...
About 7,000 years ago, a small group of people sat around a fire, next to a small lake in what is now the Nefud Desert of northern Saudi Arabia. We found some of the tools they left behind—and on ...
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