Old bonobos have bad eyesight — just like us

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)