A Senator admits to seeing prostitutes, Michael Chertoff warns of all sorts of terrorist attacks, and Stephen brings a magnifying glass to his interview with an ant expert. (0:36)
Daniel Pinchbeck believes the Mayan god Quetzalcoatl is making a comeback. Stephen wants to know who he is and why we should be excited about him. (6:15)
Dr. Jerome Groopman discusses "How Doctors Think" and explains that Dr. Gregory House is based on Sherlock Holmes, who was addicted to cocaine, not heroine. (6:07)