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The findings of a study cast doubt on the little we knew of what the Moon is actually composed of. Minerals found in craters on the Moon may be remnants of asteroids that slammed into it and not, as long believed, the satellite’s innards exposed by such impacts, a study published in the journal Nature Geoscience said. It had long been thought that meteoroids vaporize on impact with large celestial bodies. Unusual minerals like spinel and olivine found in many lunar craters, but rarely on the Moon’s surface, were therefore attributed to the excavation of sub-surface lunar layers by asteroid hits.
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