The Titanic is about as long as the Empire State building is tall.
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Jellyfish as a species are actually older than dinosaurs and sharks.
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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
The Caspian Sea is also classed as the world's largest lake.
52
Sharks, like other fish, have their reproductive organs in their chests.
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Two dogs were among the Titanic survivors.
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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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Water is actually naturally blue.
48