On June 3, 2010, a team of six volunteers began the Mars500 experiment: they were locked into a cluster of hermetically sealed habitat modules for the duration of a simulated mission to Mars lasting 520 days. "During the ‘flight,' the crew performed more than 100 experiments, all linked to the problems of long-duration missions in deep space. To add to their isolation, communications with mission control were artificially delayed to mimic the natural delays over the great distances on a real Mars flight." The simulated mission has now come to an end. The crew managed to stay healthy and sane, and they've emerged from isolation to be reunited with their families. The ESA's Mars500 page has further details on the experiment, and they've posted a video summarizing the 'trip.'