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It keeps you alive which is generally considered a plus if you have to leave the protection of whatever kind of "space ship" you are in. Space suits are pressurized, keep you warm/cool, and provide breathing oxygen. At altitudes much above 30,000 feet, there isn't enough oxygen to sustain life for very long, and above about 63,000 feet (called the Armstrong Limit), there isn't enough pressure to keep your blood from boiling at body temperature. The latter means that you would explode like an egg in a microwave, but in less time. http://en.wikipedia.org/wiki/Armstrong_Limit

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18y ago

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