Covering some 70 percent of Earth's surface, clouds play a key role in our planet's well-being. But how do they form, why are there so many types, and what clues can they give us about the weather and climate to come? Try your hand at classifying clouds and investigating the role they play in severe tropical storms.
Clouds up Close
What exactly is a cloud? Why do clouds form over some areas and not others? Take a look inside: learn about factors that cause clouds to develop in the first place and find out why there are so many different types.
Clouds and Weather
A perfectly sunny day one moment and driving rain the next. What atmospheric conditions are involved in the development of storm clouds and the dramatic weather effects they can unleash?
Clouds and Climate
Clouds have a powerful influence on the temperature of our planet. Just how they will respond as global temperatures increase is one of the most pressing scientific questions of our time.
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