Old bonobos have bad eyesight — just like us

two photos of bonobos grooming a partner

Seventeen-year-old Fuku (left photo) can groom her companion at a much closer distance than 45-year-old Ten (right photo) can groom his. That’s because older bonobos are longsighted — they have presbyopia — just like many older humans, a new study finds.

Heungjin Ryu (CC BY-NC 4.0)

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