Strange blobs in Earth’s mantle are relics of a massive collision
www.nature.com
Impact with a body called Theia 4.5 billion years ago left remnants deep inside Earth — and also created the Moon.
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The original was posted on /r/science by /u/GeoGeoGeoGeo on 2023-11-02 00:15:47.

Original Title: Scientists have identified remnants of a ‘Buried Planet’ deep within the Earth. These remnants belong to Theia, the planet that collided with Earth 4.5 billion years ago that lead to the formation of our Moon.