Chimpanzees See Butts Like We See Faces

Chimpanzees may look at each other’s butts the same way we look at faces.

A pair of researchers from Leiden University in the Netherlands and Kyoto University in Japan studied how chimps process images of other chimps’ rear ends, and found that they perceive them in the same way that we do faces. Chimps seem unable to recognize posteriors well when they are flipped upside down. Humans experience the same difficulty — what’s called an inversion effect — when looking at faces.

Lets Fac

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