For Rats, Seasonal Depression Comes In Spring, Not Winter

http://www.redorbit.com/news/science/1112831942/rats-get-depression-in-spring-not-winter-042613/

'Master Gene' Makes Mouse Brain Look More Human

http://news.sciencemag.org/sciencenow/2013/04/master-gene-makes-mouse-brain-lo.html

Big brains, no fur, sinuses … are these clues to our ancestors' lives as 'aquatic apes'?

http://www.guardian.co.uk/science/2013/apr/27/aquatic-ape-theory-primate-evolution

Competing pathways affect early differentiation of higher brain structures

http://www.sciencedaily.com/releases/2013/04/130426115636.htm

Humans and Chimps Evolved Lopsided Brains

http://www.livescience.com/28986-humans-evolved-asymmetric-brains.html

Scientists puzzle over how bat brains and rat brains build mental maps - Science

http://science.nbcnews.com/_news/2013/04/18/17808967-scientists-puzzle-over-how-bat-brains-and-rat-brains-build-mental-maps

'Hobbit' had bigger brain than thought

http://science.nbcnews.com/_news/2013/04/16/17784013-hobbit-had-bigger-brain-than-thought

Brain size didn't drive primate evolution, research suggests

http://science.nbcnews.com/_news/2013/03/28/17502596-brain-size-didnt-drive-primate-evolution-research-suggests