Why does blowing on hot soup help to cool it off? The answer is evaporation.
Research suggests that early exposure to air pollution increases the risk of obesity.
It's a gas! Air consists of nitrogen and oxygen and lots of empty space.
Where's the best place to keep warm, a mountain top or a valley? Well, it just depends...
Don't worry, there's plenty of air to go around, even in tight spaces.
Human flight began as early as the 18th-century when scientists learned how to harness the power of different gases.
Despite weighing tons, clouds seem to free-float in the air. How do the billowy marvels stay up in the sky?
Most of us take our oxygen-rich atmosphere for granted. Once upon a time, though, Earth's air was very different.
It may sound paradoxical, but warm spells and flurries often go hand in hand.
When looking at a picture of the sun, how could you tell whether or not it's rising or setting?