Travis was a chimpanzee who socialized with humans since birth. He could log onto a computer to look at pictures, watch TV using a remote control, brush his teeth, feed hay to his owner's horses, water plants, and learned the schedule of passing ice cream trucks.
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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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Dogs sometimes fake being sick to get attention.
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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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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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