In the 24 Big Questions Science Still Needs To Answer by Kelly Oakes in BuzzFeed

http://www.buzzfeed.com/kellyoakes/big-questions-science-still-needs-to-answer

Kevin Fong (space medicine expert) addressed this interesting question and added:

At the moment, astronauts that go up to the International Space Station are limited

to spending six months in space at a time because of the effects of microgravity on

the human body. But from March 2015 astronaut Scott Kelly is going to spend a year

in orbit. And his twin, astronaut Mark Kelly, will be staying on Earth.

Nasa hopes this unique twin study will give us some insight into how we can

counteract the damaging effects of space on our bodies.

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