A group of six men spent 520 days in a windowless chamber in Moscow to simulate what conditions would be like for any future manned mission to Mars.
Four of the six crew members ended up developing a sleep disorder.
Perhaps unsurprisingly, being sealed up in a giant box with no natural light was found to mess with the body's circadian rhythm.
More concerning, researchers found that the participants didn't adapt to the stressful conditions. In fact, the problems continued to get worse, creating an ever stronger physical and emotional stress on the individuals involved.
In conclusion, don't plan on that trip to Mars any time soon - unless you can encourage NASA's lightbulb manufacturing division to get a move on!
Last updated: April 1, 2013