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Astronauts Train in Underwater Lab

In the world’s only underwater laboratory, located 19 meters beneath the surface, some five kilometers off Key Largo, four U.S. astronauts prepare to visit an asteroid. Living in close quarters and making excursions only into the surrounding ocean waters, the four astronauts simulate the daily routine of a crew that would someday travel to collect samples from rocks orbiting the earth. Part of NASA's Extreme Environment Mission Operations (NEEMO) program, which is designed to test...

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