Experts think that a planet called Theia that may have collided with Earth could have left debris in our planet’s interior.
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Some scientists thought it was the same impact in space that formed the Moon, but now they have studied specific traces of the impact buried deep in Earth’s mantle.
Qian Yuan, a geologist at Arizona State University in the US, argues that the mysterious solid point in our planet’s interior is a specific part of Theia still intact inside Earth.
In a paper presented at the Lunar and Planetary Science Conference, Yuan and his team explain: “Here, we show that Theia’s mantle may be several% intrinsically denser than Earth’s mantle, which allows Theia’s mantle material to sink into Earth’s lowermost mantle and accumulate to become thermochemical piles that can cause seismic observations (solid areas). “
Yuan then said: “This crazy idea is at least possible.”
The scientists identified certain parts of Earth’s interior where pieces of Theia could still be lodged. This theory that Theia collided with Earth is known as the giant collision hypothesis.
It is said that Theia collided with the early Earth about 4.5 billion years ago.
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