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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Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
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Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
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Early American humans hunted car-size armadillos and used their shells for houses.
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The difference between antlers and horns is that antlers are shed each year and are made of bone while horns are kept for life and are made of living tissue and bone with a sheath that is very similar to human finger nails.
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When cats are happy, they may squeeze their eyes shut.
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There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
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