Early American humans hunted car-size armadillos and used their shells for houses.
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Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
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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 two oldest cats on record lived to 38 and 34 years old, both were owned by the same owner and lived off a diet of bacon, eggs, broccoli and coffee.
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Parrot parents "name" their children with a signature call.
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A domestic cat can sprint at about 31 miles per hour.
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The head of a jellyfish is called the "Bell."
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