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Are We All Aliens? The Case for Panspermia

2/11/2014 Warm Up : One theory of the origin of life suggests life could have come to Earth from another planet. In a paragraph of at least five lines, tell what you think of this idea. Are We All Aliens? The Case for Panspermia. Are We All Aliens?. Life began on Earth ____________ years ago

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Are We All Aliens? The Case for Panspermia