Simulated mission to Mars made astronauts sleepy, lethargic, and less…

Back in November 2011, a multinational crew of six ended their 17-month long simulation to Mars and back. Confined to a trailer for 520 days, the pretend-astronauts had every detail of their lifestyle tracked, including their sleep-wake cycles, physical movements, intellectual activities, and light exposure. Now,… » 1/08/13 7:20am 1/08/13 7:20am