From the deep ocean floor to vast underground caverns beneath our feet, these places challenge our understanding of the world.

The Pacific Ocean is home to some of the deepest points on the planet. In fact, four of the top six deepest spots in the world can be found in the Pacific. The Pacific's basin is uniquely low, which ...

For scientists studying the mysteries of the ocean, few places on Earth hold the level of intrigue that the Mariana Trench does. As the deepest point in all the Earth's oceans, this site has scholars ...

If you ask most people, they would tell you the bottom of the ocean is a dark and depressing place they wouldn't want to visit. It's often used as a metaphor for those kinds of feelings. But the truth ...

The bottom of the Calypso Deep, a 5,112-metre deep depression in the Ionian Sea, contains one of the highest concentrations of marine debris in the deep ocean: it is yet another testimony to the ...

Growing evidence suggests that a subsurface ocean lurks beneath the icy surface of Uranus' moon Ariel, but new research, ...

Welcome to the deep-sea diner Diving deep has evolved in nearly every type of ocean-going vertebrate. Big bony fish, such as tuna and swordfish, do it. Cartilaginous sharks and rays do it. So, too, do ...