Your corneas receive no blood supply — they get oxygen directly from the air.
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The Arctic hare has short ears to minimize heat loss.
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A sloth can take up to a month to digest a single meal.
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Certain sea slugs can incorporate stinging cells from their prey.
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The Peloponnesian War lasted nearly three decades.
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The invention of the hypodermic syringe enabled effective drug delivery.
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There are more possible shuffles of a deck of cards than seconds since Earth formed.
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Some animals can regenerate entire body parts.
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