The March 22 episode is actually hosted by Volkart Wildermuth, from Germany. He interviews several of the world's leading primate researchers. You will learn some of the recent discoveries about primate intelligence and culture, and also hear an excellent discussion of what makes humans different. Go to the website not just to hear the show, but to get a transcript and to see the extensive links.
The March 29 episode is a fascinating interview with Dan Ariely from MIT, who is the author the new bestseller Predictably Irrational: The Hidden Forces That Shape Our Decisions, which describes his experiments in what is called behavioral economics. His work has shown that people often do not make economic decisions in a logical manner. He is an extremely likable guest who shares stories from his own life as well as some of the highlights of his work. The show notes include extensive references.