According to Janna Levin, “the chillest astrophysicist alive” (says Wired Magazine), there’s a great probability that other life exists in the universe. But what form might this life take? What the heck are black holes? How many planets are out there? And why should we give a hoot about all this? Be sure to listen to this other-worldly conversation. “I find it impossible to believe we're magically the only experiment in life when we look at our own galaxy, which is a collection of 300 billion stars.”