This is a very interesting article on what happened to mice biologically in space….

18 July 2012 by Jessica Hamzelou

A group of three mice have returned alive from a record-breaking 91 days aboard the International Space Station, the longest space trip of any animal besides us. What they experienced can help us understand the effects of long-term space travel on the body. And that might help protect humans in space and back on Earth

AGE-OLD PROBLEM

Might our space mice have stumbled across a way to prevent thyroids from ageing? The thyroid produces hormones that control metabolism and sensitivity to other hormones, but ageing can slow thyroid function, leading to impaired cognition and weight gain.

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Courtesy of  http://www.newscientist.com