Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
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The cat brain weighs about 30g.
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Sloths take two weeks to digest their food.
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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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The ancestor of all domestic cats is the African Wild Cat which still exists today.
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