First stage of Mars-500 experiment is over. Mars 500 is a ground-based experiment simulating manned flight to Mars. Pictured: l-r Sergei Ryazansky of Moscow`s Institute of Medical and Biological Problems, doctor Alexei Baranov, German military engineer Oliver Knickel, sports physiologist Alexei Shpakov, Air France pilot Cyrille Fournier and cosmonaut Oleg Artemyev seen after exiting the mock-up spaceship where the six-men crew spent 105 days isolated from the world