The reason why extreme sports include the word "extreme" is not only because they challenge the physical and psychological limits of humans, but also symbolize humanity's unyielding spirit and the belief in moving towards farther goals.
Among various extreme sports, diving is one of the most dangerous activities.
The infamous Egypt Dahab Blue Hole has claimed over 200 divers, including the 40m world record-holder in free diving, earning the nickname "The Diver's Tomb."
The Jacob's Well in Texas, United States, has resulted in at least 8 fatalities.
During deep diving, divers face nitrogen narcosis at the critical depth of 40m. At this point, nitrogen dissolves into the blood, causing blurred consciousness and severe cases may even result in coma, making it impossible for divers to correctly judge their oxygen reserves, leading to depletion and death.
