Rhinos that flourished across much of North America 12 million years ago gathered in huge herds, according to a new study by the University of ...

I’m in Italy visiting a very famous volcano called Mount Vesuvius. A volcano is an opening in the Earth’s crust, which allows hot magma, ash and gases to escape from below the surface.

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 volcano.