Thanks to my brother, I have been reading about people in water.
When you dive down more than 40 feet, the weight of the water above you starts to push you deeper. You can't float up. You have to swim up.
The longest anyone has held his or her breath is over eleven minutes. That was done under water. In the water, the way your body uses oxygen changes. Remember, we evolved from a water creature. We haven't lost that adaptation completely.
The deepest free dive (on one gulp of air) is over 700 feet. Free divers seldom get the bends because they do not take in oxygen while they're in the water. Also, free diving is our second-most dangerous sport. Champions drown. (If you drown, your dive does not count.)
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