15% of snails survive digestion by birds and are found alive in their droppings, potentially leading to the spread of snail populations.
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A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
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The reindeer is the only mammal that can see UV light.
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Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
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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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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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