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 ...

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.

likely hidden deep within the planet’s atmosphere. The unexpected discovery, detailed in a companion study, suggests that atmospheric composition can shift dramatically between different layers ...