Astronauts train for years to earn the opportunity to live and study in the microgravity environment of space. But do they have the hearts for space travel?
New research shows that an astronautâ€™s heart tends to form a more spherical shape while in outer space, which could lead to cardiovascular problems during missions, RedOrbit reports. The study shines a brighter light on the physical dangers associated with space travel, and will help scientists develop exercise regimens to keep astronau
from Discover Magazine http://ift.tt/1hwGrsp