Learn about J1007+3540, a black hole that has recently come back to life and is described as a “cosmic volcano.” ...

Hayli Gubbi, a shield volcano in northern Ethiopia, erupted for several hours on the morning of Sunday, Nov. 23 — the first eruption since the start of the Holocene. When you purchase through links on ...

Each lobe of the Fermi bubbles is 25,000 light-years tall. NASA's Goddard Space Flight Center In the center of our galaxy, gigantic, balloon-like structures of high-energy radiation extend thousands ...

Hidden beneath an ancient volcanic basin on the Oregon and Nevada border, geologists say the United States may be sitting on ...

Barren Island, the only active volcano in the Indian subcontinent, rises dramatically from the Andaman Sea, offering a stark ...