An evolutionary biologist in the Czech Republic believes that human brains are being affected in significant ways by Toxoplasma gondii, a parasite that can spread from cat feces to humans. Research by Jaroslav Flegr finds a link between the parasite in humans and their likelihood of car wrecks and a possible link to schizophrenia. "There is strong psychological resistance to the possibility that human behavior can be influenced by some stupid parasite," Flegr said. "Nobody likes to feel like a puppet."
