Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
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A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
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There's a rare breed of pig that looks like a sheep.
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Parrot parents "name" their children with a signature call.
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A group of unicorns is called a blessing.
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Using a remote-controlled camera, biologists caught dolphins getting high by sucking on puffer fish. They were even caught passing the puffer fish around.
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