A major paleoanthropological fossil find was announced on September 20th. Donald Johanson is the director of the Institute of Human Origins and professor of human origins at Arizona State University, and is the discoverer of the famous Lucy fossil more than three decades ago. In this episode, he talks about the new finding and what it means for our understanding of human evolution. We also hear recent comments by John Hofmeister, the president of the Shell Oil Company, that might sound surprising coming from a person in his position. And we'll test your knowledge about some recent science in the news. Websites mentioned on this episode include www.sciam.com; www.sciamdigital.com; www.sciam.com/podcast

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