Sea-skimming crafts – which fly just above the water – were once considered Cold War relics of a failed Soviet experiment.

Giant mounds of sand discovered beneath the North Sea off Norway may scramble what we know about a key geological process.

Ocean sunfish, which feed primarily on sea jellies, are the heaviest bony fishes on the planet. They can measure 10 feet and weigh up to 5,000 pounds. They’re often called gentle giants because of ...