Twins study: How one-year mission affected astronaut's health

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What happens to the human body after a year on the International Space station, floating in zero gravity? The Twins Study -- comparing data from before, during and after astronaut Scott Kelly's mission in space with those of his identical twin brother, retired astronaut Mark, back on Earth -- is giving researchers a better idea than ever before.http://feeds.feedburner.com/~ff/rss/cnn_us?d=yIl2AUoC8zA</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=0FzYRD0L9x0:hBhFdqGy-gM:yIl2AUoC8zA) http://feeds.feedburner.com/~ff/rss/cnn_us?d=7Q72WNTAKBA</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=0FzYRD0L9x0:hBhFdqGy-gM:7Q72WNTAKBA) http://feeds.feedburner.com/~ff/rss/cnn_us?i=0FzYRD0L9x0:hBhFdqGy-gM:V_sGLiPBpWU</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=0FzYRD0L9x0:hBhFdqGy-gM:V_sGLiPBpWU) http://feeds.feedburner.com/~ff/rss/cnn_us?d=qj6IDK7rITs</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=0FzYRD0L9x0:hBhFdqGy-gM:qj6IDK7rITs) http://feeds.feedburner.com/~ff/rss/cnn_us?i=0FzYRD0L9x0:hBhFdqGy-gM:gIN9vFwOqvQ</img> (http://rss.cnn.com/~ff/rss/cnn_us?a=0FzYRD0L9x0:hBhFdqGy-gM:gIN9vFwOqvQ)
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