Four volunteers were just locked in sealed lab for 200 days for simulated moon mission

If you were like most kids, you at least ventured the thought of becoming an astronaut when you grew up. The idea of flying into space and maybe even walking on the moon just sounds so cool when you're a youngster -- and maybe even as an adult -- but you don't often consider all the compromises associated with it. A group of four volunteers are about to embark on an experiment that will test the limits of their endurance by being sealed in a laboratory for a whopping 200 days without any outside...