After over eight months of training, cosmonauts have now for the first time "walked the surface of Mars". Too good to be true? Yes, kind of. It's the Mars 500 project - a simulated mission with the goal to find out how humans react during long spaceflights.
The experiment is nearing its mid-point. After the volunteers spent more than 200 days simulating the flight to the Red Planet, they have been divided into two groups -- one staying on board a module which is simulating a flight in Martian orbit, and another one sent to land on 'the planet's surface'.
Link - via Nerdcore