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Astronauts struggle to sleep among the stars

Astronauts struggle to sleep among the stars

CNN - By Michael Nedelman, CNN

(CNN) — An odd thing happens to astronauts as they zip around the Earth at roughly 17,500 miles per hour: They don't get enough sleep. This may be partly because astronauts don't have to wake up early to see daybreak; they get a sunrise and a sunset every 90 minutes. "It's far too fast for the body …

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