Exposure of primates to cosmic radiation above 90,000 feet.

Abstract
To determine the effects of primary cosmic radiation above 90,000 ft. on the behavior of primates, a group of Java monkeys (Macacus cynamolgus) was given a series of behavioral tests before and after two of the animals were exposed to the high altitudes for a total of 62 hr. The weight, general behavior, and neurological condition of the animals remained normal after the high-altitude flights. The performance of the exposed animals on the different tests (e.g., motor and sensory discrimination) continued to improve after the flights or was equal to or better than the performance of the control animals. It is concluded that prolonged exposure to primary cosmic radiation at high altitudes produced no general behavioral loss.

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