Cady Coleman is an astronaut, serving on the ISS since December of 2010. Before she launched, she broke down everything you need to know about what it's like preparing for the crushing void of space. Could you keep up?

Coleman gave this intimidating (for couch jockeys like me, anyway) presentation at last year's EG conference. But what's EG? A lot of things! Mostly a gathering of interesting people—media, techies, astronauts and the like—talking about the interesting things that they do in an interesting way. This year's will be held April 7-9 in Monterey, CA; if you've got $4,000 handy and would like to attend, you can check out registration info here. [EG]