Alien Earth: 100 billion similar planets may be found in new study.

How Many “Other Earths” Are There? Maybe Billions. (VIDEO)

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April 5 2013 7:00 AM

How Many “Other Earths” Are There? Maybe Billions. (VIDEO)

The research won’t prove there’s life on these other Earths—but giddy scientists say this would be a big step along the way.

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