About 4.5 billion years ago, Earth had a violent neighbor. A young, still-forming planet named Theia slammed into our world ...

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

New research suggests Earth's Moon formed from the catastrophic collision of our planet with its \"sister\" planet, Theia, ...

"The most convincing scenario is that most of the building blocks of Earth and Theia originated in the inner solar system.

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

If you know any bit of information about how the moon was created, new research indicates that everyone has believed wrong.

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 ...

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

New research suggests that Theia, the object whose collision with Earth is theorized to have caused the formation of the moon ...

Scientists traced the Moon's parent planet Theia to the inner Solar System, solving a 4.5-billion-year mystery.

Earth and the planetary object that gave rise to the Moon were likely born in the same region of the solar system.

A tiny sample of the Moon locked away for more than 50 years turns out to have been hiding an astronomical secret.