Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
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The elephant shrew’s closest relative isn’t a shrew — it’s actually an elephant
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It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
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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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Jellyfish as a species are actually older than dinosaurs and sharks.
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