Ocean

An astronaut recently captured a stunning image of a "sunglint" that transformed the sea surrounding two Greek islands into a swirling silver mirror.

At subduction zones, where one plate bends deep beneath another, the sinking plate can carry more than an ocean's worth of water into the mantle over billions of years.

Rainwater can contain a number of hidden contaminants including bacteria, viruses and dust. New evidence also shows it can contain PFAS, a group of human-made chemicals that are extremely toxic.

Panthalassa, a single world ocean surrounding the supercontinent Pangaea, would have stretched at least 1,800 miles (3,000 kilometers) wider than the Pacific.

Scientists found a huge field of hydrothermal vents on the East Pacific Rise.

Due to a number of technical and logistical difficulties, as well as meandering through sparsely populated areas, there is no pressing need to build a bridge on the Amazon River.

The holes form a straight line and appear at regularly repeating distances, and they are surrounded by tiny mounds of sediment.

The Red Sea takes its name from periodic blooms of a blue-green algae called Trichodesmium erythraeum, which turn the normally vivid blue waters a reddish-brown.

More than 70% of our little blue planet is covered by water, but we can only drink a tiny fraction of it. Why can't we drink saltwater when it is all around us?