The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
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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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Cats recognise the voice of their owner, but never evolved to care.
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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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A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
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Early American humans hunted car-size armadillos and used their shells for houses.
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