The Causes of Violence and How to Prevent It, Part 1.

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).

Book critic MAUREEN CORRIGAN reviews Etna the new novel by Paul Yoon, the narration was inspired by his dog Oscar.

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.