None of the four crew members had medical training. They'd spent just four hours learning to operate a portable X-ray unit. Once in orbit, they photographed a hand, a forearm, a chest, an abdomen, a pelvis and, for good measure, a smartwatch. And the results are here for you to see. A Four-Hour Crash Course Before Launch Four astronauts orbiting Earth aboard a SpaceX Crew Dragon capsule did something historic in more than six decades of human spaceflight. They took X-rays of each other's bodies while floating in microgravity. Th... [2276 chars]
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