Eyes offer window into brain’s timekeepers
In monkeys, pupil size linked to perception of milliseconds
![a Japanese macaque](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/11/110116_ls_pupil-size_free.jpg?fit=860%2C460&ssl=1)
EYE-OPENING Pupil size could predict whether Japanese macaques would over- or underestimate a second, a new study of lab monkeys shows.
Yiannis Theologos Michellis/Flickr (CC B-SA 2.0)