"What keeps oxygen on earth? Atmosphere or magnetic field? and is it possible for earth to lose all its oxygen?"
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NASA Responds to Hawking Comments
April 29, 2010 / Posted by: Daniella Scalice
In light of the warnings about searching for extraterrestrial life issued by cosmologist Stephen Hawking this week, NASA Planetary Science Division Director James Green appeared on CNN today. He discussed the types of life that NASA’s astrobiology research and missions are geared to search for, as well as the bodies in our Solar System that are the most likely to have been habitable in the past or currently be supporting life.
Source: [Link]
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