#119 - Carl ZImmer on LIFE'S EDGE

Award-winning New York Times science columnist Carl Zimmer chats with Trey Elling about LIFE'S EDGE: THE SEARCH FOR WHAT IT MEANS TO BE ALIVE, including: what science tells us about the idea that life begins at conception, the metabolic similarities between pythons and racehorses, why the homeostasis of bats is so impressive, whether viruses are truly alive, and more.