Drone video taken near Mexico’s most active volcano continues to show ash and gasses spewing into the air, as millions of residents continue to watch for signs of a larger eruption. The Popocatépetl ...

Volcanoes are grouped into four types: cinder cones, composite volcanoes, shield volcanoes and lava volcanoes. Cinder cones are circular or oval cones made up of small fragments of lava from a single ...