With these geological processes, continents broke apart. Occasionally, we find remnants of ancient continents. Scientists have been searching for one of these, called Argoland, for decades.

An ancient slab of Earth's crust buried deep ... The slab's pull has created giant "drips" that hang from the underside of the continent down to about 400 miles (640 kilometers) deep inside ...

As these ancient continents approached one another, the ocean between them was destroyed, leaving behind the Caledonian–Appalachian mountain belt to mark the join. These tectonic ideas have ...

Explore how North America is changing as its deep cratonic root thins and pieces are dripping into the Earth's mantle.

Alexander the Great founded over 70 cities and created an empire that stretched across three continents, covering 2 million square miles. There was never one country called ‘ancient Greece’.