Jellyfish as a species are actually older than dinosaurs and sharks.
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It's impossible to sink in the Dead Sea without equipment!
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There was once an undersea post office in the Bahamas.
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In 1992, 29,000 rubber ducks washed off a ship. They were found thousands of miles away 8 years later.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
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The North Atlantic gets 2.5 centimetres (1in) wider every year.
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Two dogs were among the Titanic survivors.
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There are approximately three million shipwrecks on the ocean floor, worth billions in value and treasure.
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