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Storm Chasers: A Dangerous Ride

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In this Discovery Channel video, the Storm Chasers take a back road that nearly traps them in a massive tornado.

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How Tornadoes Work (6:30)

Tornadoes are one of the most violent type of storms, with 800 each year in the U.S. Learn more about tornadoes in this video from Discovery.

Discoveries: Toxic Hurricane (1:05)

After the winds of Hurricane Katrina died down, the Gulf Coast was left with a toxic mess. Learn more about cleaning up our environment in this video.

What Are the Odds? Earthquake (2:53)

What are the odds there will be an earthquake in the next 100 years? Learn more about the probability of earthquakes in this video.

Tsunami Science: Survivors (2:15)

A tsunami survivor tells his story. Learn more about global disasters in this video.

Tornadoes Rip Across MidWest U.S. (0:38)

Watch this video about tornadoes on HowStuffWorks. In rural Oklahoma a twister killed a man and his wife when it struck their farm house. A woman in Colorado was killed when she was caught in a tornado more than 600 feet wide. See how tornadoes work... More »

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Daily Planet: Storm Chasers (5:23)

Storm chasers are people who follow hurricanes in order to study and predict their movements. Storm chasers must be careful to always have a way to escape the wrath of a hurricane..

Daily Planet: The Waiting Game (4:29)

Mount St. Helens last erupted in 1980, but activity, including ash, steam release and movement of the lava dome, concerns scientists who believe that the volcano may erupt again.

Scientific Cliffhangers: Getting Ready to Rumble (5:27)

Since Mount St. Helens erupted in 1980, scientists have been trying to gauge if it will erupt again. They are worried that cooling rocks could meet with water and cause a steam explosion.

Hurricanes and Tornadoes: A Review (3:09)

This clip reviews the material from the previous segments on hurricanes, tornadoes and thunderstorms.

Hurricanes and Tornadoes: Tornadoes (3:50)

Storms can cause air to circulate near a thunderstorm; when this funnel touches the ground, it is called a tornado. A waterspout is a funnel cloud over water.

Hurricanes and Tornadoes: Air Pressure (4:53)

Pressure in the Earth's atmosphere is measured by a barometer; the unit of measure for air pressure is the millibar. Air pressure determines the weather.

Hurricanes and Tornadoes: Powerful Storms (1:42)

Tornadoes, hurricanes and thunderstorms are all destructive forces of nature.

Our Restless Planet: A Review of Earthquake Videos (2:13)

This clip provides a review of the material from the previous videos on earthquakes.

Our Restless Planet: Predicting Earthquakes (1:47)

Many deaths occur when the epicenter of an earthquake is near populated regions. In order to prepare for a large earthquake, readiness drills are conducted. Currently, earthquake forecasting is not very precise.

Our Restless Planet: The Science of Earthquakes (3:23)

Researchers monitor earthquakes with buried seismometers. Seismometers analyze the different seismic waves of an earthquake to determine its magnitude on the Richter scale.