Monkeys Keep Their Food Clean, Sort Of

We all have our standards. For humans, it’s the five-second rule. For macaques, it’s “think twice before eating food off a pile of poop.” The monkeys have several ways of keeping their food (sort of) clean. And the most fastidious macaques, it seems, are rewarded with fewer parasites.

On the Japanese island of Koshima, scientists have been studying Japanese macaques (Macaca fuscata) for nearly seven decades. The tiny, forested island is overrun with the monkeys, which live there naturally

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