

Build your vocabulary! We add new words for each issue.

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Cheetah: Frans Lanting/Minden Pictures
Shark: © James D. Watt/SeaPics.com
Desert: Frans Lemmens/Getty Images
Sacagawea: Mark Thiessen
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On the Move Big or small, fast or slow, all animals move. Read about some of the oddest ways of moving.

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Swim With Sharks Many people are afraid of sharks. Did you know, though, that we are more of a danger to sharks than they are to us? Dive into the world of sharks on page 2 of our March 2007 issue.
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Earth's Extremes Earth is an extreme place. There are tall mountains and deep canyons. Some places freeze all year round. Other places are always hot. Explore these extreme places on page 6 of our March 2007 issue.
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Who Was Sacagawea? Sacagawea was fearless. She traveled thousands of miles with Lewis and Clark. They explored new lands. They crossed mountains. Her legend lives on today. Meet this great American on page 20 of our March 2007 issue.
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