title: SPACE FLIGHT PROBLEMS--MECHANICAL, MEDICAL, AND MORAL.
mesh_terms: D001007:Anxiety; D001008:Anxiety Disorders; D018504:Ecological Systems, Closed; D004463:Ecology; D006801:Humans; D009014:Morals; D010827:Physiology; D011584:Psychology; D013026:Space Flight; D014893:Weightlessness
keywords: ANXIETY; PHYSIOLOGY; POPULAR; PSYCHOLOGY; SEALED CABIN ECOLOGY; SPACE FLIGHT; WEIGHTLESSNESS