Dogs have been man's pet for over 14,000 years.
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Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
The cat brain weighs about 30g.
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Two dogs were among the Titanic survivors.
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A puppy is born blind, deaf, and toothless.
16
The largest earthworm on record was found in South Africa and measured 22 feet.
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