Terry Gross

Canadian singer-songwriter Kate McGarrigle died Monday after a lifetime of making music with her family and friends. She was 63. McGarrigle grew up singing old French and Irish tunes with her parents and sisters, and went on to perform in a duo with her sister Anna.

Jonah Lehrer decided to write a book about it. In How We Decide, Lehrer explores the science of how we make decisions and what we can do to make those decisions better. Lehrer is a contributing editor at Wired and has written for The New Yorker, The Washington Post and The Boston Globe. He joins Terry Gross for a conversation about his book, the cereal aisle and paralysis by analysis.

Have you ever wondered about the personal life of the man who developed the theory of evolution? On today's Fresh Air, the conservationist Randal Keynes — Charles Darwin's great-great grandson — talks about the man behind the science: his relationship with his wife, Emma, and how they handled the death of their daughter. In 2002, Keynes wrote a book on the subject called Annie's Box, which shares personal letters and diaries documenting how Darwin cared for his daughter in the last months of her life. The book is the basis for the new film Creation.