Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
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The world’s smallest book, “Teeny Ted from Turnip Town”, is 100×70 micrometers in size and requires a scanning electron microscope to read, as light beams are too large.
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The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
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A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
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A cauliflower that weighs almost 72.5kg has broken the world record by almost 3kg.
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A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
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The Caspian Sea is also classed as the world's largest lake.
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