Sukhrob Kamolov

This cheery fellow is Sukhrob Kamolov. He's a Russian crewmember in the Mars500 project, a landlocked simulation of a flight to Mars and back.

In June, he and five other men sequestered themselves in an assemblage of four tightly proportioned, hermetically sealed modules, where they'll remain till November 2011. While they won't have to worry about being hit by any interplanetary debris or being sent off-course by a math error deep in the telemetry system, they'll otherwise be conducting themselves as if isolated far from Earth in very close quarters. In other words, that smile will surely be tested.