One reason that kittens sleep so much is because a growth hormone is released only during sleep.
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An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
Meysi is one of the world's smallest dogs, measuring in at just 7cm tall, 12cm long, and weighing a meagre 250 grams (only slightly heavier than a hamster!)
11
Alligators can live up to 100 years.
337
Jumping fleas can accelerate 50 times faster than the space shuttle.
218
It has been estimated that a bite from a grizzly bear can crush a bowling ball.
11