The results suggests that small, meat-eating dinosaurs were nocturnal; large, plant-eating dinosaurs tended to forage both during the day and at night.
The Science study also challenges the notion that mammals’ nocturnal nature evolved to avoid day-active dinosaurs.
Lars Schmitz and Ryosuke Motani of the University of California Davis have been looking at the eye parts of dinosaurs, and their modern-day descendants the lizards and birds, for a number of years.
They have been trying to determine just how big and how light-sensitive dinosaurs’ eyes would have been.
Story: BBC News | Photo: L. Schmitz