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ScienceCasts: Did Earth Have Two Moons?

Visit for the full story. Did our planet once have two moons? Some researchers say so. Moreover, the missing satellite might still be up there--splattered across the far side of the Moon. NASA's GRAIL mission could help confirm or refute the "two moon" hypothesis.

Channels: Planetary science 

Added: 2854 days ago by deek

Views: 1191 | Comments: 0

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