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 ...

To the Ends of the Earth: The Natural World - Pushing Boundaries is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire ...

including the maps and names, does not imply the expression of any opinion whatsoever of the World Heritage Committee or of the Secretariat of UNESCO concerning the history or legal status of any ...