Amassive chain of extinct volcanoes has been discovered deep below southern China, revealing a hidden piece of Earth’s geological history. This arc of fossilized volcanoes, more than 400 miles long, ...

Studies reveal that beneath seemingly tranquil mountains, magma boils in shallow layers, reducing volcanic warning time.

For two months, whenever I heard that cry, I would run up to the deck of the JOIDES Resolution to watch the crew pull up a 30-foot (10-meter) cylindrical tube filled with layered, multicolored rock ...