Though scientists believed volcanoes on the Moon to be long dead, a recent discovery suggests they were active as recently as 800 million years ago, which is fairly recent in geological time. Even ...

Add Yahoo as a preferred source to see more of our stories on Google. Far beneath the Earth's surface, a fiery world of viscous molten rock exists below the continental and oceanic plates, perpetually ...

One of the things that people forget about lava is that it is much denser and more viscous than it seems. There is all kinds of video showing rivers of lava that make it look like it is as runny as ...

Scientists have determined that ash can turn back into lava miles away from a supervolcano eruption due to reheating by a process called "viscous heating." Supervolcanoes, such as the one sitting ...

Some volcanoes explode in one violent outburst, but the regular eruptions of an active 'Strombolian' volcano are interrupted by 'chugging' - that is, frequent small eruptions. Jonathan Lees of the ...

Ash from supervolcanoes dwarfing any volcanoes on Earth today could have been so hot that it turned back into lava once it hit the ground miles from an eruption, new research suggests. Subscribe to ...