What newly discovered condition may dim hopes for manned space exploration?

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by / September 20, 2011
Expedition 28 Flight Engineers Ron Garan (top) and Mike Fossum exit the International Space Station's Quest airlock to begin their spacewalk. NASA TV

Answer:

Blindness. Specifically NASA has found that long-term exposure to microgravity seems to cause blurred vision in some astronauts. According to the Orlando Sentinel, one NASA survey of 300 astronauts found that "nearly 30 percent of those who have flown on space shuttle missions – which usually lasted two weeks – and 60 percent who've completed six-month shifts aboard the station reported a gradual blurring of eyesight."

Chad Vander Veen

Chad Vander Veen previously served as the editor of FutureStructure, and the associate editor of Government Technology and Public CIO magazines.

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