planetary scientist, United States Geological Survey
Our New Mexico space adventure ends with more from the First International Planetary Caves Workshop in Carlsbad, including a conversation with geomicrobiologist Diana Northup. Bill Nye reports from Florida on the launch of Curiosity, the Mars Science Laboratory rover. Emily Lakdawalla adds her thoughts about this ambitious new mission. Bruce Betts and Mat Kaplan look to the night sky for a celebration of past Mars visits, and for the new space trivia contest.