Scientists Discover Earth Is Actually Just Two Fused Planets

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Scientists Discover Earth Is Actually Just Two Fused Planets
Scientists Discover Earth Is Actually Just Two Fused Planets

Earth is likely made up of material from two planets, according to a new study.

Scientists have long suspected that a planetary body called Theia, which was about the size of Mars, collided with young Earth around 4.5 billion years ago.

It was already known that Theia and Earth collided, but the new evidence from the UCLA-led scientific team shows it was less of a side swipe, as previously thought, and more of a “head-on assault”.

The force of the impact resulted in early Earth and Theia, together to form a single planet, with a piece breaking off and entering its gravitational pull to form the moon.

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Researchers studied moon rocks from three Apollo missions and compared them with volcanic rocks found in Hawaii and Arizona.

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To their surprise, no difference was found in the oxygen isotopes and it was established that the rocks from each shared chemical signatures.

Edward Young, lead author of the new study and a UCLA professor of geochemistry and cosmochemistry, said, “We don’t see any difference between the Earth’s and the moon’s oxygen isotopes; they’re indistinguishable.

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“Theia was thoroughly mixed into both the Earth and the moon, and evenly dispersed between them. This explains why we don’t see a different signature of Theia in the moon versus the Earth.”

According to Professor Young, Theia was growing and would likely have become a planet, had it not been destroyed in the collision.

Maxine J. Martin

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