Jacques Mayol is the first man to reach a depth of 100 m (330 ft) undersea without breathing equipment.

Jacques Mayol was a French diver and the holder of many world records in free diving. The 1988 film The Big Blue, directed by Luc Besson, was inspired by his life story and that of his friend, Enzo Maiorca. Mayol was one of the screenwriters and authored the book Homo Delphinus: the Dolphin Within Man of his philosophy about the aquatic origins of humans.

November 23 is the 327th day of the year in the Gregorian calendar; 38 days remain until the end of the year.