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NASA'S Sunita Williams, Barry Battle Bone, Muscle Loss Due to Extended Stay in Space

NASA astronauts Sunita Williams and Barry Wilmore's extended stay in space has exacerbated bone density loss and muscle atrophy. With delays in their return to Earth due to a helium leak in their spacecraft, the Boeing Starliner, concerns mount as to how long the astronauts will be left in space before things get worse.