Denmark has twice as many pigs as there are people.
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Early American humans hunted car-size armadillos and used their shells for houses.
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Alligator snapping turtles can live for over 150 years. Scientists know this because some of the turtles had musket balls in their stomachs.
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There's a rare breed of pig that looks like a sheep.
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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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A group of kittens is called a "kindle".
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In 2011, a male tiger in India adopted a litter of orphaned cubs, taking on the role of ‘mother’. Wildlife officials say such behavior had never been observed before.
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