There are structures in Earth's mantle which are believed to be leftover chunks of Theia, which makes the connection feel quite plausible. https://www.newscien

There are structures in Earth's mantle which are believed to be leftover chunks of Theia, which makes the connection feel quite plausible. https://www.newscientist.com/article/2400567-bits-of-an-ancient-planet-called-theia-may-be-buried-in-earths-mantle/ https://www.newscientist.com/article/2400567-bits-of-an-anci...