Molten slabs of Theia could have embedded themselves within Earth's mantle after impact before solidifying, leaving portions of the ancient planet's material resting above Earth's core some 1,800 ...

A new theory, however, suggests that remnants of the ancient planet remain partially intact, buried beneath our feet. Molten slabs of Theia could have embedded themselves within Earth’s mantle ...

If the planet Theia was rich in iron and highly dense, Yuan's models showed, any pieces of it that broke off when it hit Earth would have sunk deep into our planet's mantle.

Scientists have uncovered new evidence supporting the theory that bigger chunks of Theia may have sunk into the Earth over billions of years.

The ancient almost-planet Theia struck Earth and formed the Moon. A new study suggests it also left two blobs deep inside our planet.

The results of a new scientific study suggest that huge sections of an alien planet known as Theia may reside deep within our planet, close to the Earth's core, following a cataclysmic collision ...

There may be chunks of an ancient planet trapped in Earth’s mantle. The prevailing theory of the moon’s formation is called the giant impact hypothesis, in which a Mars-sized object called ...

Scientists have developed supercomputer simulations that may explain how the Moon may have formed after a collision between the Earth and Theia, a Mars-sized planet about 4.5 billion years ago.

Soon after the Earth coalesced in the early solar system, it was hit by another planet, Theia.

A new study by ASU scientists suggests that two giant rock layers in Earth's mantle are actually remnants of an ancient planet called Theia.

Theia, an ancient planet, collided with Earth to form the moon, scientists believe. A new study suggests Theia could have also formed mysterious blobs called large low-velocity provinces, or LLVPs.

Molten slabs of Theia could have embedded themselves within Earth’s mantle after impact before solidifying, leaving portions of the ancient planet’s material resting above Earth’s core some ...