In this astronaut photo, an infamous Nicaraguan volcano coughs up toxic clouds of gas a few years after its first eruptions for more than a century. Momotombo is an active stratovolcano that sits on ...

Some scientists think we can better understand volcanoes by learning how the gaseous vortexes emerge. By Carolyn Wilke Some volcanoes perform a rather subtle trick: blowing rings of vapor that waft ...