One reason that kittens sleep so much is because a growth hormone is released only during sleep.
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During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
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Penguins have a gland above their eye that turns saltwater into freshwater.
12
George was the world's largest dog who weighed 233 pounds, stood at 43 inches tall from paw to shoulder, and ate 180 pounds of food a month.
7
When Koko, the gorilla famous for knowing sign language, was asked where gorillas go after death, she responded by signing “Comfortable hole, bye.”
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Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
12
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20