The ancestor of all domestic cats is the African Wild Cat which still exists today.
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The reindeer is the only mammal that can see UV light.
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Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
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Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
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When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
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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!)
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