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 ...

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 ...