How deep can humans actually go underwater? And what happens to the body as the pressure increases? At just 10 meters, pressure doubles. At 50 meters, the brain starts to fail. At 150 meters, breathing is no longer automatic. And then there’s 332 meters. In 2014, Egyptian technical diver Ahmed Gabr reached the deepest dive ever made by a human — without a submarine, without a capsule. Just tanks, gear, and years of discipline. At that depth, oxygen can cause seizures, nitrogen distorts reality,