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There might be remnants of an ancient planet buried inside Earth

There might be remnants of an ancient planet buried inside Earth

An ancient impactor called Theia hit Earth to create the Moon. New research suggests the rest of that planet may still be inside Earth.

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RELATED TOPICS: EARTH | MOON
Jurik Peter/Shutterstock
Jurik Peter/Shutterstock

Researchers are fairly certain that we gained our favorite satellite, the Moon, after a planet, Theia, collided with the proto-Earth 4.5 billion years ago. What’s not certain are the details surrounding Theia’s fate. Was it a hit-and-run, or did the mantles of the two planets merge?

Qian Yuan, Earth scientist at Arizona State University, and his colleagues recently suggested a new line of evidence to support the latter hypothesis, suggesting that Theia not only merged with Earth, but we might know right where the remnants of its mantle reside in Earth.

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