http://www.washingtonpost.com/news/speaking-of-science/wp/2014/08/01/low-testosterone-could-be-what-made-us-civilized-humans/?tid=rssfeed
http://www.washingtonpost.com/news/speaking-of-science/wp/2014/08/01/low-testosterone-could-be-what-made-us-civilized-humans/?tid=rssfeed