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
In 1992, 29,000 rubber ducks washed off a ship. They were found thousands of miles away 8 years later.
707
Water is actually naturally blue.
48
The time interval from first sighting of the iceberg that sank the Titanic to impact was a little over 30 seconds.
105
The Titanic is about as long as the Empire State building is tall.
174
There was once an undersea post office in the Bahamas.
241
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
Jellyfish as a species are actually older than dinosaurs and sharks.
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