Space Travel Hurts the Eyes

"Astronauts experience bone and muscle loss in the weightlessness of space, and now the first study of returning space travelers' eyes suggests that prolonged amounts of time in orbit can take a significant toll on vision, although the long-term effects aren't clear," says a post on Yahoo!News. "The new study, of more than 300 astronauts in the U.S. space program, found that almost 50 percent of those who served on long missions -- six months or more -- reported experiencing new problems with their ability to see objects near to them while in space and for some time after returning to Earth." Read more.