The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
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A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
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Cats sleep for 70% of their lives.
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Squirrels forget where they hide about half of their nuts.
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