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University of Nebraska Medical Center

Humans’ Wounds Heal Much More Slowly Than Other Mammals’

NYT We naked apes need Band-Aids, but shedding the fur that speeds healing in other mammals may have helped us evolve other abilities. Watching wild baboons in Kenya, Akiko Matsumoto-Oda, an evolutionary biologist and primatologist at the University of the Ryukyus in Japan, had a front-row seat to the violence between these monkeys, especially the males.

“I was struck by how frequently they sustained injuries,” she said, “and, even more, by how rapidly they recovered — even from seemingly severe wounds.”

Compared with her own experiences with nicks and cuts, the baboons’ ability to heal seemed like a superpower.

In a study published on Wednesday in Proceedings of the Royal Society B, Dr. Matsumoto-Oda and her colleagues compared the healing rates of humans, chimpanzees, monkeys and mice. They found that human wounds took more than twice as long to heal as wounds of any of the other mammals. Our slow healing may be a result of an evolutionary trade-off we made long ago, when we shed fur in favor of naked, sweaty skin that keeps us cool.

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