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About the Earth
Photo: Lava oozes from Kilauea, Hawaii Volcanoes National Park

Inside the Earth

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Photo: Rice paddy in China valley

Surface of the Earth

These landforms make up our world.

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Photo: Volcano crater in Ethiopia

Dynamic Earth

Our world's always changing.

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Photo: Space shuttle view of Hurricane Gordon

Earth's Atmosphere

What's in our air?

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Photo: Moss-covered trees in the Hoh River Valley's temperate rain forest

Habitats

Explore the world.

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Photo: An F3 category tornado swirls across South Dakota

Natural Disasters

The power of nature.

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Did You Know?

Weightless Where?

At the center of the Earth you would be weightless because gravity would be tugging at you equally in all directions.

News: Latest Earth Stories

Tainted African Dust Clouds Harm U.S., Caribbean Reefs
India Basins Half a Billion Years Older Than Thought
VIDEO: Kilauea Spews Lava Fountain
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Video: Spelunking

Take an exhilarating journey to the deep, dank, dark depths of the Earth, and discover why so many are addicted to the adventure sport of spelunking. You might be next.

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Photo: Grand Canyon in Arizona

Photo Gallery: Canyons

Sculpted over eons by nature, these ever changing landforms enchant tourists, photographers, and geologists alike. Get a look at these unique and often surreal structures.

See the Photos
Photo: The Grand Canyon

Video: Saving the Grand Canyon

Lured by breathtaking views, millions of Americans visit the Grand Canyon each year. Sadly, the Grand Canyon's greatest asset—its beauty—may also be its downfall.

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Discover the extraordinary impact that an average human life has on the world.

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The Green Guide
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