Taylor Tippett
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Why do male chimpanzees throw rocks at the same trees for more than a decade?
Why do male chimpanzees throw rocks at the same trees for more than a decade? Lisa Lock Scientific Editor Andrew Zinin Lead Editor Walking through the savanna-woodland landscape of Boé National Park, Guinea-Bissau, you might encounter a tree covered in gnarled scars, with an accumulation of rocks surrounding its base. The chimpanzees may have left the area, but you are lucky nonetheless, because you have stumbled upon evidence of a rare—and potentially cultural—chimpanzee behavior:...