New research shows 8,000-pound sloths once dug caves, adapted to oceans, and roamed widely—until climate and humans brought their downfall.

It’s kind of a freak accident that it actually happened,” said David Nesvorny with the Southwest Research Institute.

Entomologist Dr. Jessica Ware joins WIRED to answer the internet's burning questions about the world of insects. Are cockroaches so resilient that they'd survive a nuclear war? Why do praying mantis ...

The largest volcanoes in Earth’s history owe their formation to powerful geological phenomena called mantle plumes—upwellings of abnormally hot rock within the Earth’s mantle that rise toward the ...

Tourists have been told to check for warnings before climbing towards the summit of Italy's Mount Etna after an eruption sent ...

In 1669, in what has been considered the volcano’s worst known eruption, lava buried a swath of Catania, about 15 miles away ...