TIL Humans reach negative buoyancy at depths of about 50ft/15m where they begin to sink instead of float. Freedivers utilize this by "freefalling", where they stop swimming and allow gravity to pull them deeper.

https://www.deeperblue.com/guide-to-freefalling-in-freediving/
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1g5zjlz/til_humans_reach_negative_buoyancy_at_depths_of/