There was once an undersea post office in the Bahamas.
241
Two dogs were among the Titanic survivors.
262
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
It's impossible to sink in the Dead Sea without equipment!
72
The Caspian Sea is also classed as the world's largest lake.
52
Sharks, like other fish, have their reproductive organs in their chests.
248
The time interval from first sighting of the iceberg that sank the Titanic to impact was a little over 30 seconds.
105