Some genetic aspects of adaptation to hyperdynamic environments.

Reports by many investigators have described a wide variety of biological changes in man and animals exposed to gravitational fields, some of these having a beneficial effect but others are detrimental. These changes are considered to result from the alteration in the gravitational field since (a) they appear when the field is changed, (b) the degree of change tends to be proportional to the change in acceleration strength, and (c) these changes disappear, and at varying rates, when the gravitational field is returned to normal gravity. However, little information has been developed concerning the reception and transduction of the gravitational stimulus, or its lack, to produce these biological changes.