By the early 1900s, scientists had identified major layers of the atmosphere based on how the temperature changed at different levels above the sea. Thanks to these studies, we now know the five ...

A layer of charged particles, called the ionosphere, surrounds Earth, extending from about 50 to 400 miles above the surface of the planet. Disclaimer: AAAS and EurekAlert! are not responsible for ...

The Earth’s atmosphere is the relatively thin layer of gases surrounding the planet. The atmosphere is held close to Earth by gravity, but the higher you go away from the Earth’s surface ...

Many human activities release polluting gases into the atmosphere, such as farming animals ... the outer core and the inner core. These layers each have different structures and properties.

From the 1980s to the early 2000s, global levels of stratospheric ozone also dipped by 5% to 6% ... there is no protective ozone. But our atmosphere is still vulnerable, and it is not clear whether ...