http://phenomena.nationalgeographic.com/2015/04/08/could-mothers-milk-nourish-mind-manipulating-microbes/
http://phenomena.nationalgeographic.com/2014/02/03/how-breast-milk-engineers-a-babys-gut-and-gut-microbes/
http://phenomena.nationalgeographic.com/2014/01/23/study-of-1-5-million-cows-shows-daughters-get-more-milk-than-sons/
http://phenomena.nationalgeographic.com/2011/01/31/gut-bacteria-steer-the-development-of-the-young-brain/