Volcanoes. A short video for 11-14 year old pupils, exploring tectonic activity and volcanoes and featuring case studies from ...

This story appears in the April 2011 issue of National Geographic magazine. When? This is the question that has brought two of the world's leading volcano scientists to the center of Africa ...

Volcanoes can look like small mountains or hills. A volcano is an opening in the Earth's crust that allows magma, hot ash and gases to escape. Composite volcanoes are the most common type of ...

On June 14, 1914, three men climbed Lassen Peak to see why a seemingly dormant volcano had started rumbling 16 days before. Now, peering into a newborn crater, they felt the ground tremble.