Geography
The Formation and Classification of Clouds
Quick fact
A single cumulus cloud can weigh over a million pounds, yet it floats in the sky because its water is spread across billions of tiny droplets, each too small to fall.
Why this is interesting
You've seen clouds every day, but have you ever wondered why they look so different—some fluffy, some layered, some thin and wispy? The secret lies in the invisible dance of air and water.