Ancient limestones reveal how volcanic carbon once suffocated the oceans - offering a stark warning as modern oxygen levels continue to drop.

A patch of the Atlantic Ocean just south of Greenland is cooling while much of the world warms. The origin of this "cold blob ...

Beneath the ocean surface, a global mission is underway that could reshape our understanding of our planet. Inspired by Sir ...

The forward deployment of warships marks Washington's commitment to maintaining a free and open Indo-Pacific region, the Navy said.