Located in the United States, one of the world's largest volcanoes is gearing up to explode. It's known as the Yellowstone ...

Around 74,000 years ago, a volcano called Toba in Sumatra exploded, and some scientists think it had a serious impact on the ...

The explosiveness of a volcanic eruption depends on how many gas bubbles form in the magma—and when. Until now, it was thought that gas bubbles were formed primarily when the ambient pressure dropped ...