Cats, T. gondii, and Our Brains

The story of Czech scientist Jaroslav Flegr and his decades-long work to prove his suspicion that a parasite often present in cats' feces was messing with his mind and, therefore, with the minds of others as well: http://www.theatlantic.com/magazine/archive/2012/03/how-your-cat-is-making-you-crazy/8873/