[Adaptation to new environments: microgravity].

: Review and analysis of the experiments with Wastar rats in microgravity onboard "Cosmos" biosatellites allows to conclude that adaptive potentials of mammals in space flights lasting up to 1/50 th of their life span are enough for rapid elimination of microgravity-induced metabolic and structural alterations on return to Earth, for maintenance of adequate reactions to acute and chronic stressors in the post-flight period, for normal reproductive function and life span. Consideration is given to individual differences in body responses to the micro-g environment.