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 Titanic is about as long as the Empire State building is tall.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
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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.
105
The Caspian Sea is also classed as the world's largest lake.
52
There was once an undersea post office in the Bahamas.
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There are approximately three million shipwrecks on the ocean floor, worth billions in value and treasure.
22
Jellyfish as a species are actually older than dinosaurs and sharks.
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