Half of Earth’s oceans are more than 3.2km deep. Beneath them lie cavernous plains untouched by sunlight, vast gaping trenches made by Earth’s tectonic plates shifting, and ranges of underwater ...

Scientists haven't been able to reach the bottom.

Researchers filmed a 10-to-13-foot sleeper shark off the South Shetland Islands, in what may be the first recording of the species that far south.

Public opposition to the military’s plan to build up to seven telescopes in a state conservation district atop Haleakalā has been mounting in recent weeks, after the release of a draft environmental ...

Hike boardwalks, join campfire circles, and explore sinkholes in this North Florida escape.