Located in the Amazon rainforest, this river is famous for its high temperatures, which can reach the boiling point of water. The river's heat is attributed to geothermal activity, specifically ...

A plume of molten rock deep beneath eastern Africa is pulsing upward in rhythmic surges, slowly splitting the continent and ...

A landscape shot at the Dallol volcano in the Afar Region in Ethiopia. (Image credit: A.Savin via Wikimedia Commons) ...