After 50 years of the Search for Extraterrestrial Intelligence, could it be that we are not listening for the right signal? Or are we alone? Cosmologist and prolific writer Paul Davies makes a number of fascinating suggestions in his new book. Emily Lakdawalla's best of the Planetary Society blog. Bill Nye says Neil Armstrong and Buzz Aldrin disagree about NASA's new plans. Bruce Betts and Mat Kaplan share a new song before they get to the space trivia contest in What's Up.