Report on the Annual Meeting of the American Geophysical Union

Our own Emily Lakdawalla reports on her visit to the AGU, where she heard the latest news about Mars, two moons of Saturn and our own Moon. Bill Nye is inspired by a couple of house-shaking sonic booms. Bruce Betts and Mat Kaplan explore the night sky and celebrate the holiday season with special guests. They also find time to offer a new space trivia contest that will award a Planetary Radio t-shirt and an Oceanside Photo & Telescope rewards card.