Should astronauts risk their health for Mars mission? - BBC News

31 May 2013 Last updated at 19:01 ET Help Radiation poses manned Mars dilemma Why do we see faces in inanimate objects? Viewpoint: Mars - what we've learnt in five years via Science - Google News http://news.google.com/news/url?sa=t&fd=R&usg=AFQjCNF2dZUz-v09Qs1Yt_QhjhlT0MKx5Q&url=http://www.bbc.co.uk/news/science-environment-22727305

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