They are mud volcanoes, one of the world's most unique natural phenomena in the Gobustan region that looks like a crater on ...

If there's one thing you, and Gollum, should know about volcanoes, it's that "lava=hot". That, and it's not a great idea to ...

A mud volcano at the seafloor where methane-rich fluids from the subsurface are emitted to the water column. These ecosystems are at the interface between the subsurface and surface realms and are ...

An international team of researchers wondered how volcanoes that spew mud instead of molten rock might look on the Red Planet compared with their counterparts here on Earth. In chamber experiments ...

A mud volcano has erupted in Azerbaijan, sending plumes of black smoke and flames up to 300m (980ft) into the sky. Government officials say cracks up to 40m deep have appeared in the area after ...

Dramatic footage shows the Popocatepetl volcano spewing gas and ash in Mexico. The volcano, nicknamed Don Goyo, one of the ...

A 20-foot-high wall of mud, ash, and melted snow roared down the mountain, snapping tree trunks. Three days later, a huge mass of ashes and gases shot out of the volcano, devastating a swath a ...