Ocean

Heat waves are reaching the bottoms of Earth's oceans, and that could be a big problem for the creatures that live there.

In samples of organic-rich black shale, scientists found evidence for oxygen depletion and hydrogen sulfide expansion in ancient seas.

The bottom of the Mariana Trench is about 35,876 feet (10,935 meters) deep, making it deeper than Mount Everest is tall.

Sea dragon dads and octopus moms are the extreme marine parents we need, winning photos show.

Scientists say excessive water use is to blame, with 74% of diverted lakewater being used for unsustainable agricultural practices

The formation of the Bering Land Bridge connecting Asia to North America occurred much later than experts thought.

A suspected rogue wave recently crashed into a cruise ship near Antarctica killing one and injuring four others. Where did it come from?

Billions of years ago, wind, heat and the rotating Earth formed currents just as they're produced today — but their paths would have been wildly different.

Light-up fish and ancient volcanic structures are among the discoveries of a new expedition to map the remote Cocos Islands in the Indian Ocean.

A collapsed dam at a diamond mine in South Africa recently released a torrent of mining waste into the surrounding area. A new satellite image shows the trail of dried and potentially toxic mud left behind.