Poços de Caldas, in the southern part of the state of Minas Gerais, Brazil, is built on one of the most unique geological formations on the planet, as it developed inside a volcanic caldera surrounded ...

A new study proposes a slightly scary idea: what if “extinct” volcanoes aren’t actually extinct, but just waiting? Slowly building a magma stockpile over time so they can one day reawaken and explode ...