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How can a match light?
Do insects sleep?
How does the Sun light up?
Why is venom poisonous?
Why does spinning make you dizzy?
How do they make fog in movies?
Why do skunks spray?
Were there dragons long ago?
Why are dogs' noses wet?
What makes a spaceship take off?
Why do ladybugs have black spots?
Why does the house creak at night?
How do you grow?
What forms rings inside trees?
Why do sweets taste good?
How do thermometers find the temperature?
Why does human skin only get drier?
How does a star twinkle?
What good is the narwhal's tusk?
Why can't a human run as fast as a cheetah?
How do a fish's gills work?
Why are seasons different around the world?
Why do our bodies make methane?
Why is insects' blood yellow?
How do fish live under frozen water?
Why do we yawn?
Why do wheels spin so fast when a car moves?
How do clouds stay floating in the sky?
Did any kind of horse have a horn on its forehead?
Why does this straw look bent?
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