The inside of the Earth is full of blobs from another planet that crashed into our world during its early life. In the 1980s, geophysicists uncovered a remarkable revelation. Two massive blobs of unusual material lurking deep within the Earth's core, each of a continental scale, one positioned beneath the African continent and the other beneath the Pacific Ocean. These mysterious masses, each double the size of the Moon, have captivated the scientific community for the past decade due to their distinct elemental composition when compared to the surrounding mantle. Now scientists believe they have solved the mystery. They are the remnants of a planet, Theia, which crashed into Earth during the early stages of its life. A new study featuring researchers from the Arizona State University (ASU) School of Earth and Space Exploration proposes that a substantial portion of Theia became integrated into the young Earth, forming the blobs while residual debris from the collision coalesced to give birth to our Moon. They theorise this as simulations conducted by the researchers revealed that a substantial portion of the energy imparted by Theia's impact remained in the upper section of the mantle. Because the impact failed to fully liquefy the lower mantle, the iron-rich materials from Theia remained predominantly intact.