Terry Gross

Singer and actress Cher. She's just released "It's a Man's World" (Warner Brothers), her first CD in five years. She talks Terry about her early life and career.

In his new book, Thayer says moods are not just psychological in origin, but the direct result of biological conditions. The book explains the nature of moods and teaches ways to control them. Thayer is a bio-psychologist and Professor of Psychology at California State University, Long Beach.

Science writer David Quammen's new book is "The Song of the Dodo: Island Biogeography in an Age of Extinctions" (Scribner). During his eight years of research, Quammen studied the biogeography of islands around the world. His travels introduced him to plants and animals previously unimagined. Quammen is a two-time recipient of the National Magazine Award for his science essays and other work in Outside magazine.