Activity

It Does Make Logical Sense For A Prey To Operate When There Is Less Risk Of Being Eaten. So, Maybe Inconclusive, Some Mammals May Have Become Active At Night To Avoid Top Predators, Like The Dinosaurs, That Operated During The Day. Talk About An Adaptive Evolution.

If you enjoy sleeping at night instead of the day, thank the dinosaurs for going extinct – LA Times

http://beta.latimes.com/science/sciencenow/la-sci-sn-dinosaurs-mammals-nocturnal-20171106-story.html

The extinction of the dinosaurs facilitated a switch from a nocturnal lifestyle to an increase in daytime activity in many ancient mammals.