Dogs have been man's pet for over 14,000 years.
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Tigers can see 6 times better at night than humans.
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It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
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An alligator can go through 2,000 to 3,000 teeth in a lifetime.
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Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
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