Science
- 1181
- Auroras
- Colourful introduction to the northern and southern lights, with clear explanations of how and why they occur.
- 1182
- Auroras, Painting in the Sky
- Self-guided color illustrated tutorial that shows what an aurora looks like from the earth and from space, what makes them happen, where you can see them, and whey they are different colors.
- 1183
- Living in the Atmosphere of the Sun
- Online exhibit portrays aurora as a consequence of a solar storm.
- 1185
- Climate History
- A detailed historical discussion on how and why the Earth's climate changed through time.
- 1188
- United States Interactive Climate Pages
- Provides data for major United States cities showing temperature and rainfall averages and extremes.
- 1189
- Red Sunset, Green Flash
- Tells why sunsets look red, and why you can sometimes see a green flash just before the sun sets.
- 1190
- Avalanche Awareness
- Explains why we need to worry about avalanches, and describes the different types.
- 1191
- Avalanche Dangers Often are not Apparent to the Novice
- Questions and answers about what an avalanche is, and the dangers of them.
- 1192
- Avalanche Types
- Illustrated explanations of how they are formed, and why they behave differently.
- 1193
- NOVA Online: Elements of a Slide
- Explains why avalanches are difficult to predict, and illustrates the different ways they can form.
- 1194
- Bush Fires and Wild Fires
- Reports and photographs from major bushfires in Australia, as well as a historical list.
- 1195
- 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.
- 1196
- Wikipedia: Wildfire
- Illustrated explanation of the types, causes, effects and prevention. Includes photographs from around the world.
- 1197
- 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.
- 1198
- Hot Science: The River's Gift
- Questions and photographs show how flooding rivers can be a benefit to the surrounding land.