Stupider With Monogamy

http://www.nytimes.com/2014/02/27/science/stupider-with-monogamy.html

Bird study finds females have a better sense of direction

http://www.theglobeandmail.com/news/national/bird-study-finds-females-have-a-better-sense-of-direction/article17129872/

Human brain 'like a peacock's tail' during courtship

http://static.guim.co.uk/sys-images/Guardian/Pix/pictures/2014/1/28/1390930200413/The-Temptation-of-Adam-an-011.jpg

Language and tool-making skills evolved at same time, study says

http://phys.org/news/2013-09-language-tool-making-skills-evolved.html

Handedness in Marsupials Is Dependent On Gender

http://www.sciencedaily.com/releases/2013/03/130305200312.htm