Early American humans hunted car-size armadillos and used their shells for houses.
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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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The reindeer is the only mammal that can see UV light.
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Dogs have been man's pet for over 14,000 years.
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