Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
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One reason that kittens sleep so much is because a growth hormone is released only during sleep.
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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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Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
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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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