The levels of atmospheric oxygen have fluctuated significantly over geological time.

Astronomers must correct for atmospheric refraction when measuring the precise positions of stars, because the Earth's atmosphere bends starlight and makes celestial objects appear higher than they truly are.

Scientists study the middle atmosphere to understand how solar radiation affects upper-level winds.

Pilots must be aware of turbulence patterns in the lower atmosphere during descent.

The National Oceanic and Atmospheric Administration released new climate data showing rising ocean temperatures and shifting weather patterns.

When the manager accused him of lying, you could cut the atmosphere with a knife.