Chasing Volcanoes Around the Solar System

Planetary scientist and leading volcanologist Rosaly Lopes talks about her two new books, one about volcanoes everywhere in the solar system, and one that's a travel guide to both active and dormant ones here on Earth. Emily Lakdawalla learns our planet is putting on a few pounds in Q&A. Bruce Betts offers up another space trivia question on What's Up! Space headlines, too.