Ancient mammal relatives were active at night 100 million years before origin of mammals

4 septiembre 2014

New study reveals that nocturnality has older origin than previously thought. Synapsids, living about 300 million years ago, were probably active at night.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/tuPxbZM2mp0/140903204119.htm