

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

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Sea Turtle: © idreamphoto/ Shutterstock
Water: © Tatjana Strelkova/ Shutterstock
Lightning: © Jhaz Photography/ Shutterstock
Colorado River: Skip Brown/ National Geographic Stock
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Turtle Travels Sea turtles travel thousands of miles to find food, mates, and nesting areas.

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Water Ways Earth's water is always on the move. It travels from the oceans to the sky. It falls from clouds and fills streams, rivers, and oceans. Check out Earth's water cycle on page 10 of our April 2010 issue!
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Storm Warning Huge thunderstorms rumble. Lightning strikes. Strong winds blow. Deadly tornadoes spin. This is the U.S. Midwest, the stormiest place on Earth. Explore this extreme weather with a scientist on page 12 of our April 2010 issue.
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Troubled Waters Its raging waters carved the Grand Canyon. Now the Colorado River is drying up. Follow the twists and turns in the life of this river on page 18 of our April 2010 issue.
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