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Samples from Apollo missions containing isotopic oxygen supporting the theory that a Mars-sized object (called Thea) slammed into Earth setting off a (more)

Samples from Apollo missions containing isotopic oxygen supporting the theory that a Mars-sized object (called Thea) slammed into Earth setting off a series of conglomeration events that ultimately created the Moon. -- FULL STORY: http://goo.gl/MGfZ0E

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