A few weeks ago I spent a few hours volunteering next to him at the Planetary Society's booth at the National Science & Engineering Fair. He's doing a great ser

A few weeks ago I spent a few hours volunteering next to him at the Planetary Society's booth at the National Science & Engineering Fair. He's doing a great service for the Society by drawing big crowds. I must say, though, that it looked absolutely exhausting. Hours of signing autographs and small talk with eager fans. He went well past his allotted time and he was likely starving by the end.