Water is actually naturally blue.
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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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There was once an undersea post office in the Bahamas.
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The North Atlantic gets 2.5 centimetres (1in) wider every year.
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Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
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It's impossible to sink in the Dead Sea without equipment!
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There are approximately three million shipwrecks on the ocean floor, worth billions in value and treasure.
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