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
Ancient mammal relatives were active at night 100 million years before origin of mammals
4 septiembre 2014
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