Mammals gave up night life only after dino doom: study

/ Nov 10, 2017

Mammals gave up night life only after dino doom: study

The earliest mammals were night creatures that only emerged from the cover of darkness after the demise of the daytime-dominating dinosaurs, researchers say. This would explain why relatively few mammals follow a daytime-active or "diurnal" lifestyle today, and why most that do still have eyes ...