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NASA astronauts head underwater to simulate Mars missions
Once a year, NASA's astronauts make a big change -- trading their vocation of conducting scientific experiments in space for one of underwater research. For the next two and a half weeks, an international team of 'Aquanauts' will be living on the ocean floor at NASA's Aquarius habitat off of the coast of Florida. As always, the NEEMO (NASA Extreme Environment Mission Operations) expedition will serve as a testing ground for new equipment. This year, it's also giving the team a taste of what it would be like to live on Mars.
