Continent-size islands deep inside Earth's mantle could be more than a billion years old, a new study finds.

Perhaps initiated by heat building up underneath the vast continent, Pangaea began to ... plate tectonic activity takes place at four types of boundaries: divergent boundaries, where new crust ...

This was when the Earth was one continent called Pangaea that slowly broke apart and spread out to form the continents we ...

While continental drifts take eons to fully effectuate, this ongoing split has experts concerned about its rapid progress.

But the continents get cooler as they move away from the mid ocean ridge, and they subside. The ocean rises over the edges of the continent, creating the passive margins. They are called passive ...

New crust is continually being pushed away from divergent boundaries (where sea-floor spreading occurs), increasing Earth's surface. But the Earth isn't getting any bigger. What happens ...