Why We Think Theia Existed

The giant-impact hypothesis posits that billions of years ago a Mars-sized body named Theia collided with the early Earth.
The immense energy from this impact not only significantly altered Earth’s rotational dynamics but also resulted in debris being ejected into space. Over time, this debris coalesced to form the Moon.We do not know for sure if Theia existed and if it collided with the young proto-Earth, but the evidence is compelling.For one, we are the only rocky planet with a substant