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National Geographic little kids first big book of why

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Why do clocks run clockwise? and other imponderables : mysteries of everyday life explained

How did they do that? :wonders of the far and recent past explained

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Meat-eating plants : toothless wonders

Why is snot green? : and other extremely important questions (and answers)

Funny answers to foolish questions

Weird & wonderful

That's creepy : spine-tingling facts that will test your creep-out factor

Curious : the desire to know and why your future depends on it

Hidden wonders : a guide to the planet's wildest, weirdest places

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Weird but true! 8 : 350 outrageous facts

Weird but true! 9 : 350 outrageous facts

Bear in love

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I wonder why Columbus crossed the ocean and other questions about explorers

Questions and answers about dinosaurs

Questions and answers about science

Why don't haircuts hurt? : questions and answers about your body

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Ask the astronaut : a galaxy of astonishing answers to your questions on spaceflight

I wonder

Questions and answers about ancient history

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Go, go America

Simply unbelievable

Ultimate weird but true

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Ripley's Special Edition 2016