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World of the Estuary: Oysters
- Oysters are bivalve mollusks with shells shaped according to how crowded they were as they grew.
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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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Violent Storms: Tornadoes
(2:15)
How do tornadoes work? Find out more about tornadoes in this HowStuffWorks video.
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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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Mountains of Fire: The Hawaiian Islands
(1:41)
The volcanoes in the Hawaiian Islands are not on a plate boundary, but at a hot spot where magma has found a way through the earth’s crust.
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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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Planet Earth: Mountains: On the Edge
(2:59)
The largest glacier lies in the Karakoram Mountains in Pakistan.
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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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