Geothermal power development has traditionally been about drilling down into subsurface reservoirs of hot water. Enhanced geothermal is expanding the field to include dry, permeable hot rock where water can be added.
Mercury may once have had a large ocean of magma, Messenger data shows, shortly after its formation about 4.5 billion years ago.
Scientists say they've identified the trigger for the largest explosive volcanic eruptions on Earth.
Scientists examining 20 years of satellite data have found a sombrero-shaped bubble of magma 62 miles across - and, appropriately, located in South America.
A giant 'balloon' of magma has been welling up under the Greek island of Santorini, raising it an extra five and a half inches above the sea.
Astronomers using NASA's Spitzer Space Telescope have discovered what may be the nearest world to our solar system that's smaller than Earth.
Supervolcanoes may be able to form in just a few hundred years - far, far more quickly than previously believed.
The volcanic Greek island of Santorini - named by the BBC as the world's best island last year - appears to be working up to an eruption, its first for over 60 years.
Scientists believe they've discovered why the moon has no active volcanoes, despite containing plenty of liquid magma.
The moon appears to be far richer in water than previously believed, following the discovery of 'melt inclusions' in rocks brought back from the Apollo mission in 1972.
There's a vast ocean of molten magma beneath the surface of Jupiter's moon Io, NASA scientists have found.
Geologists have been testing a technique to generate energy from magma, after molten rock unexpectedly flowed into an exploratory well they'd been drilling in Iceland.
Scientists at the Woods Hole Oceanographic Institution (WHOI) have observed the Earth's crust forming in an entirely unexpected way — and one that could affect the world’s climate.