Water is actually naturally blue.
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Two dogs were among the Titanic survivors.
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The Titanic is about as long as the Empire State building is tall.
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The North Atlantic gets 2.5 centimetres (1in) wider every year.
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Jellyfish as a species are actually older than dinosaurs and sharks.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
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The Caspian Sea is also classed as the world's largest lake.
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