The most expensive cow in the world was sold in 2009 for $1.2 million.
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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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The oldest known animal in the world was 'Ming' the 405 year old clam, discovered in 2007.
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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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Honeypot ants are a unique insect that use their own bodies as living storage pots of honey.
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There's a lizard known as the 'Jesus Lizard' that can run across water.
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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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