On This Episode
Co-Founder and Executive Director Emeritus for The Planetary Society
Cosmos One project director Louis Friedman calls from Russia, where he is checking progress on the world's first solar sail. He also announces the sail's participation in New York City's Centennial of Flight celebration. Emily Lakdawalla looks for tectonic activity on Earth's neighbors. Bruce Betts brings us even closer to Mars, and a new trivia contest.