See how far away from each other the Skywalker twins were raised, where the Kessel run took Han Solo and more.

This impact not only created the planet we call home today, but also threw off enough rock to form the moon that lights up our night skies. Some scientists suggest that some of Theia’s leftovers ...

Another slightly more fun theory is that the pieces are chunks of an ancient planet. Theia is a hypothetical Mars-sized planet that hit Earth around 4.5 billion years ago, throwing off enough rock ...

Life on our planet remained very simple for a long, long time. Complex life-forms like us emerged only in the past few millions of years. The atoms in your body are many, perhaps 7 billion billion ...

A collision with a Mars-size planetary object called Theia 4.44 billion years ago, left, might not only have formed the moon but also given rise to plate tectonics.

Fragments of Planet Theia appear to be buried deep beneath Africa and the Pacific Ocean. And now more evidence has been found deep in the moon via NASA's GRAIL craft ...

It’s generally thought that Earth did live through an apocalypse of planetary proportions about 4.5 billion years ago, when a Mars-sized planet named Theia slammed into it.

Consequently, the researchers say, the melted mantle of Theia didn’t completely mix with Earth’s mantle. That would have made the Theia remnants indistinguishable from Earth’s mantle as a whole.

The results of a new scientific study suggest that huge sections of an alien planet known as Theia may reside deep within our planet, close to the Earth's core, following a cataclysmic collision ...