Léo Grasset Léo Grasset is a brilliant young French punk scientist par excellence, founder of Dirty Biology and author of the blog Dans les testicules de Darwin, devoted to biology, testosterone, and rock 'n' roll (danslestesticulesdedarwin.blogspot.uk). He has n excellent web presence (17,000 followers on Twitter) and is one of France's leading up-and-coming evolutionary biologists. Read More Read Less