Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Scientists widely ...

Scientists widely agree that an ancient planet likely smashed into Earth as it was forming billions of years ago, spewing debris that coalesced into the moon that decorates our night sky today. The ...

In a first, researchers have discovered fragments of Earth's precursor that contain distinctive chemical fingerprints in ...

Traces of the ancient Mars-sized wandering planet Theia that nearly destroyed Earth and formed the Moon 4.5 billion years ago have been found in lunar rocks. This goes some way to proving a long-held ...

AN ENORMOUS magma ocean once blanketed our planet, and it may have had a big role in the birth of the Moon. That’s according to an exciting new study, which claims half of the lava pool was fired into ...

Blobs of rock lurking deep inside the planet could be the last remaining pieces of Theia, an early world that collided with Earth billions of years ago, a new study claims. The moon is thought to have ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Soon after the Earth coalesced in the early solar system, it was hit ...

(CNN) — Scientists widely agree that an ancient planet likely smashed into Earth as it was forming billions of years ago, spewing debris that coalesced into the moon that decorates our night sky today ...