Once Upon a Time, there was no such thing as SCUBA diving.
It turns out that Joe Neanderthal’s friend Blorg once suggested they go diving. Since it was approximately four billion degrees below zero and Blorg was not considered especially bright, Joe suggested he do something anatomically difficult with the diving suggestion.
The first person to “breath” while underwater was Robin Hood (the fox) as documented in the Disney version of Robin Hood. (Go re-watch the movie if you don’t believe me.) He uses a reed as a breathing tube. Back in 500 BCE, a Greek soldier supposedly did the same thing (go ask PADI if you don’t believe me) but Robin Hood is cuter so in this blog credit goes to him.
Alexander the Great (best books about him are the ones written by Mary Renault, but if you haven’t read The King Must Die, you should start there) reportedly hid underwater during the siege of Tyre (I’ll look that one up another day) by using a barrel as a diving bell.
Do not confuse Alexander the Great’s Diving Bell with Alexander Bell’s non-diving telephone.