Deep-Space Heart Health: Astronauts Face Cardiac Problems

Astronauts who fly far beyond the Earth are more likely to experience heart problems than spaceflyers whose missions are closer to home — and the cause may be deep-space radiation, a new study finds. Astronauts who took part in NASA's Apollo missions were five times more likely to die from heart disease than astronauts who had never been to space, according to the study. In addition, the Apollo astronauts were four times more likely to die of heart disease than astronauts who had flown in