Ocean

All three lakes used to be part of the same ancient body of water.

Here are the measurements for the deepest depths in each of the world's five oceans, and a look at the unique animals that live in these deep zones.

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.