Science
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- Climate History
- A detailed historical discussion on how and why the Earth's climate changed through time.
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- United States Interactive Climate Pages
- Provides data for major United States cities showing temperature and rainfall averages and extremes.
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- Red Sunset, Green Flash
- Tells why sunsets look red, and why you can sometimes see a green flash just before the sun sets.
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- Avalanche Awareness
- Explains why we need to worry about avalanches, and describes the different types.
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- Avalanche Dangers Often are not Apparent to the Novice
- Questions and answers about what an avalanche is, and the dangers of them.
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- Avalanche Types
- Illustrated explanations of how they are formed, and why they behave differently.
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- NOVA Online: Elements of a Slide
- Explains why avalanches are difficult to predict, and illustrates the different ways they can form.
- 1170
- Bush Fires and Wild Fires
- Reports and photographs from major bushfires in Australia, as well as a historical list.
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- BushFires Clearly Explained
- Describes how they start, what effect they have on the environment, and what people can do to manage them properly. Includes diagrams of the way a bushfire develops.
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- Wikipedia: Wildfire
- Illustrated explanation of the types, causes, effects and prevention. Includes photographs from around the world.
- 1173
- Flooding on the Red River of the North
- This area of North Dakota and Minnesota in the United States has experienced a lot of floods. Photographs and diagrams explain why, and show the damage caused over the years.
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- Hot Science: The River's Gift
- Questions and photographs show how flooding rivers can be a benefit to the surrounding land.
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- Fly-by Movies of Ancient Landslides
- Computer simulation and film footage shows landslides and mudflows that took place in California in 1996 and 1997.
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- Geography Site: Lahars and Pyroclastic Flows
- Explains the causes and effects of pyroclasitic flows.
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- Neanderthals on Trial
- Website is companion to NOVA documentary which explores the ancestral roots of humans.
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- Build Your Own Weather Instruments
- Provides links to directions for building rain gauges, anemometers, psychrometers, wind streamers, temperature graphs, and rainfall graphs.