An anonymous reader writes: "Just how grueling will a trip to Mars be? To find out, six people are going to spend 18 months in a steel capsule somewhere in Russia, with no way in or out and a 20-minute delay in all communications with the outside world. The first two ground-based "cosmonauts" have now been selected for the big Mars500 experiment, Romain Charles, a Frenchman, and Diego Urbina, a Colombian-Italian.
The longevity test will determine how easily a 500-day mission to Mars might work out from the human angle. The two chaps will be joined by three Russians and a Chinese volunteer, yet to be announced, and all of them will then be sealed into four windowless metal compartments which are isolated from the rest of the world--meaning that supplies and every piece of equipment will need to be popped inside before the door is bolted."