In Moscow they have this thing called Mars500, a simulation of longterm spaceflight. Eight volunteer cosmonauts have spent the past several months in "a series of windowless steel tubes representing a spacecraft." They recently pretended they had landed on Mars, and did a simulated Martian surface excursion by putting on spacesuits and walking around in a big sandbox for about an hour. Now they're going to get back in the windowless tube and pretend to fly back to Earth. All in all, a pretty cool science project. But they'll probably get beat by some guy with a soda-and-vinegar volcano.