An international team of researchers entered a claustrophobic metal module in northern Moscow Tuesday to spend three months in windowless isolation intended to simulate the stress and fatigue of space flight to Mars. While a real mission to Mars could be at least 20 years away, Russian and European space officials say the experiment will help make it closer. The all-male crew of four Russians, a German and a Frenchman were carefully selected by Russian and European Space Agency experts from 6,000 volunteers, officials said.
