Octopuses have three hearts and blue blood.
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A blue whale's tongue can weigh as much as an elephant.
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Some insects undergo complete metamorphosis from larva to adult.
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Octopuses have three hearts and blue blood.
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Narwhals are known for their long spiral tusks.
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Some amphibians undergo dramatic transformations during metamorphosis.
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A wolf's howl can travel several miles.
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Some birds can mimic human speech.
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A zebra’s stripes may help confuse predators.
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