http://www.economist.com/node/16479286 http://www.economist.com/node/16479286 This article describes how variations in intelligence has to do with parasite loa

http://www.economist.com/node/16479286 http://www.economist.com/node/16479286 This article describes how variations in intelligence has to do with parasite load and nutrition. May explain a lot of the lack of intellectuals and educated individuals in some countries.