What are earthquakes? Gain a new perspective on these powerful phenomena with this iTunes U course co-produced by the California Academy of Sciences and Northern California public media provider KQED.

part of the controversial border wall between palestine and israel Palestine Cars waiting at Hizma Checkpoint Aerial Traffic jam,Security tower at Hizma Town Checkpoint in North Jerusalem divergent ...

The movement of the plates creates three types of tectonic boundaries: convergent, where plates move into one another; divergent, where plates move apart; and transform, where plates move sideways ...

Keep an eye on the map to see where in the world the activity takes place. Also known as spreading boundary, a divergent boundary occurs where two plates move apart, allowing magma, or molten rock ...

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 ...

Midocean ridges are not continuous features. Midocean ridge spreading centers (MOR on the map below) are offset by numerous transform faults. MORs are, of course, divergent plate boundaries where two ...