Symbiosis may be more important to evolution than scientists once thought.

Beachgoers in San Diego may have spotted some glistening, purple shells reminiscent of small gemstones in the sand recently.

Six endangered sea turtles are back in the ocean off the coast of Cape Cod after months of rehab for "life-threatening medical conditions."In their third release of the season, the New England ...

Darcy Deefholts, a 19-year-old surfer who went missing in Australia July 9, was found the following day on a remote, uninhabited island.

Dozens of quakes hit July 11 off the Salton Sea in California. More than a dozen smaller quakes hit the area hours before the larger quake. Then dozens followed.

Dozens of quakes hit July 11 off the Salton Sea in California. U.S. Geological Survey More than a dozen smaller quakes hit the area hours before the larger quake. Then dozens followed.

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

Yemen's Houthi rebels killed 3 mariners with an attack on a ship in the Red Sea, a European naval force says, fueling concern over a possible new wave of attacks by the Iran-backed group.

Houthi attacks on a commercial vessel in the Red Sea follow Israeli strikes on Yemen's ports, heightening regional tensions.

Israel's military struck Houthi ports in Yemen on Monday following attack on a vessel in the Red Sea, with the Houthis responding with missile fire.