Why is the Sky Blue? Why are jungles in danger? Who switched on the first electric light bulb? With clear explanations and amazing photos you'll find the answers to these and loads more questions about our world inside this book! So go on, test your friends and see what they know!

Garbage Trucks (Pebble Plus: Mighty Machines)

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Teen Consumer Smarts: Shop, Save, and Steer Clear of S…

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Westward Expansion (Making of America (Raintree))

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Sharks Past and Present (Prehistoric Animals and Their…

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The Inca City Of Cuzco (Places in History)

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What Happened? (Learn to Read, Read to Learn: Science)

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Computer Hacking (Crime Scene Investigations)

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Asteroids, Comets, and Meteorites (First Facts: Solar …

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Drawing Wicked Tyrants (You Can Draw Fantasy Figures)

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Why is the Sky Blue? (Discovery Kids) (Discovery Why?)

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