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Cellphone Video Shows Tornado Destruction
- Watch this video about tornadoes on HowStuffWorks. Tornadoes that ripped through southern U.S. states this week have killed at least 20 people. Video images from a cell phone show the magnitude of the twister that destroyed much of a high school in Enterprise, Ala.
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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.
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Why? Tell Me Why! Alaska Oil
(1:30)
After spending a week in Alaska, Discovery News' Kasey-Dee Gardner wanted to find out why the state is so abundant in that resource.
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Discovery Wonders of Weather: Lightning Phenomena
(5:05)
Lightning will strike anything that stands high above the ground. Trees are a favorite target. Watch a lightening video at HowStuffWorks.
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Mountain Building: Volcanic Mountains
(5:46)
Volcanic mountains form when magma or lava solidifies into solid rock. This type of mountain commonly forms on divergent boundaries and on some convergent boundaries.
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Planet Earth: Mountains: On the Edge
(2:59)
The largest glacier lies in the Karakoram Mountains in Pakistan.
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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.
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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.
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Gamma Rays and Lightning
(2:19)
Watch this video courtesy of Duke University explaining the connection between gamma rays and lightning. Lightning emits gamma rays that be detected thousands of miles away. Gamma rays in lightning are caused by a process called "runaway breakdown".
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