Site provides information on the Earth's atmosphere as well as offers additional information about Earth.

The Earth's atmosphere is a thin layer of gases that surrounds the Earth. It composed of 78% nitrogen, 21% oxygen, 0.9% argon, 0.03% carbon dioxide, and trace amounts of other gases. This thin gaseous layer insulates the Earth from...

Learn about the atmosphere and its different layers.

Provides an overview of the thermosphere, a layer of the Earth's atmosphere.

Overview of the Exosphere, the uppermost region of Earth's atmosphere.

Overview of the Mesosphere, a layer of the Earth's atmosphere.

Overview of the Troposphere, the lowest layer of Earth's atmosphere.

Detailed overview of the stratosphere, a layer of the Earth's atmosphere.

This article explains that as our knowledge of life on the planet evolves, we've come to use the word biosphere as a way of explaining the entire intertwined network of life on Earth. This concept combines an understanding of geology,...