Nobel laureate Sir Paul Nurse chats with Trey Elling about WHAT IS LIFE? FIVE GREAT IDEAS IN BIOLOGY, including: how a butterfly inspired the first time he ever considered the question of life, answering this question in a book that could be understood by scientists and non-scientists alike, and why he focused on these five ideas along with details about each: the cell, the gene, evolution by natural selection, life as chemistry, and life as information. Plus, Paul shares his thoughts on a few current challenges and whether mankind is up to the task.