The North Atlantic gets 2.5 centimetres (1in) wider every year.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
104
The time interval from first sighting of the iceberg that sank the Titanic to impact was a little over 30 seconds.
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It's impossible to sink in the Dead Sea without equipment!
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Jellyfish as a species are actually older than dinosaurs and sharks.
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The Caspian Sea is also classed as the world's largest lake.
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There are approximately three million shipwrecks on the ocean floor, worth billions in value and treasure.
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