- Q&A: How to Rate the Habitability of Other Planets - What's the most habitable planet? http://www.popsci.com/science/article/2011-11/popsci-qampa-building-intergalactic-habitability-index 5 comments space
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- NASA - NASA Probe Data Show Evidence of Liquid Water on Icy Europa http://www.nasa.gov/topics/solarsystem/features/europa_20111116.html 90 comments
- Search For Aliens Should Include Intelligent Machines, Says SETI Astronomer http://www.popsci.com/science/article/2010-08/search-aliens-should-include-search-intelligent-machines-says-seti-astronomer 30 comments
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