A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
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The elephant shrew’s closest relative isn’t a shrew — it’s actually an elephant
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Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
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