Space: The Hazards of Orbital Flight

Nausea, fatigue, higher pulse rates are a few of the dangers

The space shuttle Challenger, its maiden flight twice rescheduled, sat on its Florida pad last week plagued by glitches. Gas leaks had been discovered in both an original engine and its replacement. But for the next group of astronauts, mechanical foul-ups are only one worry. Today's space travelers have an additional concern: the body's reactions to zero gravity.

U.S. Astronauts Bill Lenoir and Bob Overmyer experienced nausea and vomiting during the fifth flight of the Columbia last November. Lenoir's distress helped force changes...

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