Dogs have been man's pet for over 14,000 years.
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In 1918, a homing pigeon saved over 190 American soldiers by delivering a message to nearby support despite having been shot through the breast, blinded in one eye, covered in blood, and with a leg hanging on by just a tendon.
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Cats and dogs can hear ultrasound.
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Domestic pigs average a top speed of about 11 miles per hour.
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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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