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Are We Alone?

shared by SeeingStructure on Aug 22, 2012 in Science

Are We Alone?

shared by SeeingStructure on Aug 22, 2012 in Science

10,922 views

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In 1961, astronomer Frank Drake came up with an equation to estimate how many intelligent alien civilizations might exist in our galaxy. Each variable is a crucial factor for developing such a civilization.
Rank: 52 of 1321 in Science

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