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Water in Our Environment: Ocean Pollution
- Streams and ponds may contain harmful chemicals, even when the water appears clean. The same is true for ocean water and wildlife, as fish may contain harmful chemicals in their flesh from exposure to pollution.
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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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Forces of Nature: Tropical Storms
(1:55)
Hurricanes can last for days and have a large area of destruction.
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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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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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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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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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Making the Grade at Avalanche School
(0:29)
Avalanches are fast, powerful and just plain scary; and Alaska Avalanche School director Blaine Smith knows all about them. Jorge Ribas asks him three questions.
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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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