Five months of zero-G on the International Space Station can wreak havoc with the human body if you don't work very hard. Clay Anderson did just that. He talks about he managed on this week's show. Bill Nye the Science Guy has more thoughts about those clouds on Mars. Emily Lakdawalla explains why Pluto is out but Earth is still in. Bruce Betts has eclipse news for Mat Kaplan and a Planetary Radio t-shirt to give away in the new space trivia contest.