Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
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The Hercules beetle, despite weighing only 100 grams, can lift 8 kilograms, making it one of the proportionally strongest animals in the world.
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Early American humans hunted car-size armadillos and used their shells for houses.
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A dork is a whale's penis.
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Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
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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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