Ocean

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?

A seashell held to your ear may sound like the ocean, but so does cupping your hand or holding a bowl at the same spot. Here's why.

Scientists recently discovered rare brine pools — dense, salty depressions — at the bottom of the Red Sea, where microbes thrive under extreme conditions.

RNA viruses may influence the flow of carbon through the ocean.