One fateful day about 4.5 billion years ago, a Mars-sized body called Theia collided with proto-Earth, turning both into a ...

About 4.5 billion years ago, a colossal impact between the young Earth and a mysterious planetary body called Theia changed everything—reshaping Earth, forming the Moon, and scattering clues across ...

According to the leading theory of how the Earth-Moon system formed (the Giant Impact Hypothesis), a Mars-sized object (named ...

'Theia' is a long-vanished world, a planet-sized body thought to have smashed into the early Earth and that helped to form ...

Moon’s precursor planet, Theia, disappeared billions ago, leaving scientists no direct chemical evidence to support the ...

This meant that both celestial bodies were neighbors before the collision took place. To support this hypothesis, researchers ...

Theia, the world that helped form the Moon, came from the Solar System. Chemical clues in Earth and Moon rocks reveal this ...

Roughly four and a half billion years ago the planet Theia slammed into Earth, destroying Theia, melting large fractions of ...

New research reveals that Theia, the colossal, Mars-sized impactor that collided with the Earth to birth our Moon, may have ...

Discover how scientists have used iron isotopes to determine the likely origin of the Mars-sized planet named Theia.

Around 4.5 billion years ago, a dramatic event changed Earth forever. A massive, planet-sized body called Theia slammed into ...

The most widely accepted explanation for how the Moon was formed is the giant-impact theory. It states that a Mars-size ...