- Search for E.T. Should Extend Beyond 'Alien Earths,' Astronomer Says http://www.space.com/20940-alien-life-search-earth-twins.html 4 comments science
- Search for E.T. Should Extend Beyond 'Alien Earths,' Astronomer Sara Seager Says http://www.space.com/20940-alien-life-search-earth-twins.html 6 comments space
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