Explore the World's Largest Underwater Cave January 17, 2018 - The world's longest underwater cave has been discovered near the city of Tulum, on Mexico's Yucatán Peninsula. The new discovery ...

These underwater hockey players had great swimming skills. Much like ice hockey, the game needed to be played with precision and treachery. Watch to see underwater footage of the chaotic game.

These underwater hockey players had great swimming skills. Much like ice hockey, the game needed to be played with precision and treachery. Watch to see underwater footage of the chaotic game.

A new NBC News Decision Desk poll reveals disapproval ratings for some of President Trump’s policies -- and also that Americans care the most about the economy and the threats to our democracy.

The jetpack lasts about 90 minutes underwater, and it floats, so you won’t have to worry about it weighing you down if you want to hang out at the surface of the water. It’s not cheap, however.

Eurotunnel owner Getlink has also previously mentioned Cologne, Frankfurt and Geneva, as well as Zurich, Marseille, Bordeaux and Lyon as potential cities for an expanded cross-Channel railway network.

PLYMOUTH, England — Earth’s oceans are losing light, and it’s happening so fast that scientists are calling it one of the planet’s largest unnoticed habitat collapses.Over the past 20 years, an area ...

When the two of us met, we were about as far from the ocean as you can get–at an altitude of 12,000 feet, in Lhasa, Tibet. We spent the day touring the capital city, sampling momos (traditional ...

A new type of underwater robot has made it possible to peer deep inside the USS Arizona, the sunken naval battleship that was bombed 75 years ago at Pearl Harbor, Hawaii. The remotely-operated ...