The ocean, blanketing over 70% of the Earth’s surface, is estimated to be home to more than half of all life on our planet.

Humans have sailed the world’s oceans for thousands of years, but they haven’t all reached port. Researchers estimate that there are some three million shipwrecks worldwide, resting in shallow rivers ...

Just off Miami Beach, an ambitious underwater art installation is quietly filling with life, turning a stretch of ocean floor ...

Wondrous kelp beds harbor a complex ecosystem that’s teeming with life, cleaning the water and the atmosphere, and bringing ...

UNDATED (WKRC) - Researchers have discovered a range of underwater mountains that are home to a shocking amount of rare marine species, including one that had never been caught on camera. While ...

Editor’s note: A version of this story appeared in CNN’s Wonder Theory science newsletter. To get it in your inbox, sign up for free here. A mile and a half beneath the ocean’s surface, the seafloor ...

Few things in life are more fascinating than the underwater world, and with the recent technological advancements and the emergence of personal exploration devices such as underwater scooters, even ...

Polar sea ice is vanishing far faster than most people expected, and the change is not only visible from above. Beneath the ...

If you've ever dreamed of gliding underwater with the freedom of a dolphin, the CudaJet might be the gadget for you. Unlike most underwater propulsion systems that strap onto your arms or legs, the ...

Marine animals inevitably eat what we toss in the ocean, including pervasive plastics—but how much is too much?

Researchers examined more than 10,000 animal autopsies to figure out how much plastic is too much for ocean wildlife ...

Our warming planet is now a fact of life. For centuries, abnormal temperature fluctuations have existed and affected our ecosystems. The ocean is one such ecosystem, delicate and easily damaged by ...