Yahoo Science:

Nearly 48 years after Apollo 14 returned from the moon with a cargo of collected rocks, geologists have established that at least one of them originated 20 km below the Earth’s surface.

In a new study, they describe how they believe the two gram fragment was hurled into space during a massive asteroid strike around four billion years ago, subsequently striking the Moon and coming to rest on its surface.

The rock is composed of quartz, feldspar, and zircon, all commonly found on Earth and highly unusual on the Moon.

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