This week, if all goes as planned, two spacecraft will be heading to Mars. The European "Mars Express," carrying the rover Beagle Two, launched Monday. NASA's Mars Exploration Rover — the first of two — is scheduled to launch Sunday. Join host Ira Flatow and guests for a discussion about the missions: will they find signs of past life on the Red Planet? We'll also talk about new results from the Mars Odyssey Mission.
*Principal investigator, THEMIS Camera, NASA Mars Odyssey Mission
*Professor of geological sciences, Arizona State University, Tempe, Arizona
*Lead scientist, Beagle II
*Chief of the Planetary and Space Sciences Research Institute, The Open University, Milton Keynes, United Kingdom
*Deputy Project Scientist, Mars Exploration Rover 2003 Project, Jet Propulsion Laboratory, Pasadena, Calif.