One reason that kittens sleep so much is because a growth hormone is released only during sleep.
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A giraffe's kick is so powerful that it can decapitate a lion.
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The colossal squid has the largest eyes in the world.
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A puppy is born blind, deaf, and toothless.
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It's possible to train your cat to use the toilet as a litter box and even flush afterwards.
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In 2011, a male tiger in India adopted a litter of orphaned cubs, taking on the role of ‘mother’. Wildlife officials say such behavior had never been observed before.
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Travis was a chimpanzee who socialized with humans since birth. He could log onto a computer to look at pictures, watch TV using a remote control, brush his teeth, feed hay to his owner's horses, water plants, and learned the schedule of passing ice cream trucks.
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