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NASA takes to the sea to test new space tools
What's the best way to simulate the conditions of outer space here on Earth? Go to the bottom of the ocean, of course. NASA has actually been sending astronauts to an underwater habitat for years under the NASA Extreme Environment Mission Operations (NEEMO) program, and the 20th expedition is slated to begin soon. On July 20th, a team of NASA, ESA (Europe) and JAXA (Japan) astronauts will start testing new tools and techniques for future spacewalks to get them used to different surfaces and gravity levels on asteroids, the moon and Mars.