The oldest known animal in the world was 'Ming' the 405 year old clam, discovered in 2007.
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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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Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
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Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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When dragonflies mate, their tails form a love heart.
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The most expensive cow in the world was sold in 2009 for $1.2 million.
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