Science: Humans in Space

Unmanned space flight is almost in the bag. Rockets have already risen to the edge of space, and no one in the rocket business doubts that unmanned satellites will soon be revolving on orbits around the earth. Manned space flight is much more difficult because of the vulnerability of human crews. Last week a symposium at the University of California discussed some of the problems.

The human body is adjusted to mild cosmic ray bombardment at the earth's surface, but no one knows what will happen to humans who spend considerable amounts of time above the sheltering atmosphere. At last week's symposium,...

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