The world's southernmost active volcano has kept a lake of molten lava boiling for decades

Mount Erebus in Antarctica is one of only a handful of volcanoes on Earth with a persistent lava lake, a churning pool of molten rock that has stayed liquid rather than crusting over since it was first observed in the 1970s. Volcanologists camp on the icy slopes of this active volcano to study it, one of the most extreme fieldwork sites on the planet.

— Philip Kyle, Mount Erebus Volcano Observatory research program — New Mexico Institute of Mining and Technology, ongoing since 1980