Ash from Mount Etna has forced the fourth closure of Sicily's Fontanarossa airport since the volcano began erupting two weeks ago. The shutdown is expected to last the entire weekend and comes at the ...

There is no easy explanation for how the San Andreas fault, responsible for some of America's most powerful earthquakes, has ...

Witness 25 Moments Filmed Seconds Before Disaster Strikes. See the haunting calm before chaos in these unforgettable clips.

Explore 25 of Earth's most incredible extremes, from Everest's peak to the Mariana Trench. Discover the planet's hottest, ...