Ocean

An ongoing project to map 100% of the global ocean floor by 2030 just passed the 20% mark.

Earth's middle layer is chunky, like peanuts in a sea of caramel.

Researchers just sunk a drill 5 miles below the Pacific Ocean's surface to dig the deepest hole below the ocean in history.

Erosion has caused the top of Darwin's Arch to crumble away.

The researchers say the discovery will give them new insights into how the immune system works, as well as enabling them to revise some of the most basic assumptions of immunology.

The rocks contain chemical "fingerprints" from when the magma oceans crystallized.

A new study reveals pirate attacks are more common in waters experiencing destructive and illegal fishing, suggesting the two may be linked.

Frequently mistaken for discarded piles of beach trash, ropelike sea whips are a type of colorful coastal coral.

At least twice, the Arctic Ocean was a freshwater pool cut off from other oceans and capped with almost 3,000 feet of ice.