One reason that kittens sleep so much is because a growth hormone is released only during sleep.
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The Lion's Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before the dinosaurs (over 650 million years ago).
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It has been estimated that a bite from a grizzly bear can crush a bowling ball.
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A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
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A giraffe's kick is so powerful that it can decapitate a lion.
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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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