Terry Gross

DANIEL LIEBERMAN, author of the new book Fed Up: What Evolution Reveals about Food, Diet, Health and Eating Well. He’s a professor of biological Sciences at Harvard. And he's the founding chair of Harvard's Department of Human Evolutionary Biology. As part of his research, he tried a series of diets to see how his body reacted, including the Atkins diet and lesser known diets like the Blue Zone diet. (THIS INTERVIEW CONTINUES INTO THE SECOND HALF OF THE SHOW).

Best-known for his band The Frames and his part in the 2007 film Once, Hansard got his start as a street busker in Dublin. He died July 29 in a motorcycle crash. Originally broadcast in 2008.

Jon Bernthal, has spent two decades playing the kind of men you'd want to avoid, and somehow he makes you root for them anyway. This summer, he's in two major films, reprising his role as The Punisher in the upcoming Spider-Man movie and starring in Christopher Nolan's "The Odyssey." His breakout role in 2010 was as Shane on "The Walking Dead" - a sheriff's deputy protecting a band of survivors from zombies until he becomes the greater threat.