Today it's a year since six would-be astronauts of the European Space Agency (Esa) and Russian Institute of Biomedical Problems experiment, called Mars 500, were sealed inside a mock spaceship in Moscow to simulate a 520-day roundtrip to Mars. The six men, three Russians, a Chinese, a French, and an Italian, have lived and worked to a strict timetable since they were into this capsule on June 3,...