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.

A massive collision between the Indian tectonic plate and the Eurasian tectonic plate is causing the Himalayas to grow, but new research suggests it might also be ripping Tibet apart.

GPS measurements of plate motion aren’t enough to figure out the forces involved, just as the speed of two cars isn’t really enough to predict the outcome of a collision.

The plate tectonics that determine the shape of our continents may have originated from a huge impact billions of years ago. This huge collision with the Earth, thought to have occurred around 4.5 ...

THE WOODLANDS, TEXAS — Vestiges of a moon-forming cataclysm could have kick-started plate tectonics on Earth.. The leading explanation for the origin of the moon proposes that a Mars-sized ...

The plate boundary between Africa and the Iberian Peninsula could cause large tsunamis, according to a new study published recently in Nature Communications. Due to a lack of data, the studies ...