Old bonobos have bad eyesight — just like us
![two photos of bonobos grooming a partner](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/11/110816_sz_bonobos_main_free-web.jpg?fit=860%2C460&ssl=1)
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)