Wenshuai Liu

According to the leading hypothesis, the Moon was born from a collision between Earth and a planet called Theia. However, calculations predicted the Moon should consist mostly of Theia’s material, yet it’s almost a chemical twin of Earth. A new model cracks the paradox: if Theia’s interior was dense

The Moon is almost identical to Earth in composition, which contradicts giant impact models. A new hypothesis: Theia was solid and cold, while Earth was a boiling ball. The impact splashed mostly terrestrial material into space, and the Moon inherited our planet’s chemical signature.