The Titanic is about as long as the Empire State building is tall.
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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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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.
52
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.
22
More than a dozen men have stood on the surface of the moon, but only three have been to Challenger Deep in the Marianas Trench, the deepest known spot in the ocean.
17
There was once an undersea post office in the Bahamas.
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