Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
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Dogs have been man's pet for over 14,000 years.
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Dogs can be trained to identify the scent of lung cancer long before symptoms develop.
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Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
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Dogs can make about 100 different facial expressions.
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Dogs sometimes fake being sick to get attention.
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