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What are Roman numerals?
by Kate Simmons
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Why do paper cuts hurt?
by Kate Simmons
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What are blood vessels?
by Kate Simmons
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What is an egg yolk?
by Mya Kagan
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How do earthworms breathe when they're in dirt?
by Kate Simmons
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How does a magnifying glass work?
by Kate Simmons
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What are ligaments?
by Kate Simmons
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What is an encyclopedia?
by Kate Simmons
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What is crystal?
by Brian Griffin
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Kids Tell Us: What is peace?
by whyzz editor





