One reason that kittens sleep so much is because a growth hormone is released only during sleep.
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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.
11
Early American humans hunted car-size armadillos and used their shells for houses.
12
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
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