Featured guest is bestselling science author, Stanford scientist and atheist Robert Sapolsky, with a lively discussion of primates, atheism, evolution and naturalistic explanations for the origin of religions. The show includes an update on the Foundation's faith-based challenge, going before the Supreme Court later this month, a song in homage to stem-cell research, and a look at fascinating freethought writers born in early February. The show is cohosted by Dan Barker and Annie Laurie Gaylor, who jointly direct the Freedom From Religion Foundation. (MP3, 52 min, 23.5 MB)