Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
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Sharks, like other fish, have their reproductive organs in their chests.
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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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Dogs have been man's pet for over 14,000 years.
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A cow produces around 200,000 glasses of milk in her lifetime.
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The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
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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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Allegedly, Chrysippus, the Greek philosopher, died of laughter after getting his donkey drunk and watching it try to eat figs.
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