The ocean covers more than 70 percent of Earth’s surface, yet we’ve explored less of it than we have the surface of the moon.

Below the waves of the Mediterranean, Europe's KM3NeT neutrino telescope is on a cosmic hunt. Towering strings of sensors ...

Notable sightings along the way included the discovery of an extensive crinoid meadow at a depth of 9,100 meters (29,855 feet ...

The historian Procopius described how a creature called Porphyrios terrified sixth-century sailors for 50 years. But what was ...

Diving 120 feet beneath the surface, we explored a long-lost shipwreck and found something we never expected inside. This ...

The ocean's smallest engineers, calcifying plankton, quietly regulate Earth's thermostat by capturing and cycling carbon.

It was a very early morning in August when an entire mountainside in Alaska’s Tracy Arm fjord detached and slid into the deep ocean water beneath it.

As Arctic sea ice melts, new life may emerge from the thaw. Researchers have discovered that bacteria beneath and along the melting ice are converting nitrogen gas into a form that fuels algae. The ...