The Moon's cratered surface preserves the record of impacts that occurred during the late stages of its accretion. New simulations show that a collision with a companion moon may have formed the lunar farside highlands. See Letter p.69
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Zuber, M. Making mountains out of a moon. Nature 476, 36–37 (2011). https://doi.org/10.1038/476036a
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DOI: https://doi.org/10.1038/476036a
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