The Caspian Sea is also classed as the world's largest lake.
52
The time interval from first sighting of the iceberg that sank the Titanic to impact was a little over 30 seconds.
105
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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Jellyfish as a species are actually older than dinosaurs and sharks.
383
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
In 1992, 29,000 rubber ducks washed off a ship. They were found thousands of miles away 8 years later.
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