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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There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
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Sharks, like other fish, have their reproductive organs in their chests.
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Penguins have a gland above their eye that turns saltwater into freshwater.
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Some lizards, in which the tail is a major storage organ for accumulating reserves, will return to a dropped tail after the threat has passed, and will eat it to recover part of the sacrificed supplies.
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