Italy's Mount Vesuvius, Nicaragua's Cerro Negro, and Indonesia's "Gates of Hell" are just a few of the world's popularly visited volcanoes. Dangerous or safe?

The ash cloud that burst out of Mount Vesuvius was, at its core hot, heavy and deadly. "It's like a landslide. That material is able to knock down houses," Giordano said. But at the cloud's edges ...

Researchers working to decipher the contents of a burned, still-rolled scroll have uncovered both the author and the title of the text nearly 2,000 years after it was buried in the Mount Vesuvius ...