Most of the U.S. volcanoes that have been making themselves known since spring woke up a bit, shook themselves off and then ...

Hidden beneath the Philippine Sea, this colossal supervolcano features a caldera an impressive 150 km (93 mi) in diameter, making it the largest known caldera in the world, even larger than ...

The Great Dividing Range is one of the world’s longest and most fascinating mountain ranges, stretching across Australia from Queensland to Victoria. Unlike many mountain ranges that are the result of ...