The record for holding your breath underwater (amongst humans) is an impressive 24 minutes and 37 seconds, set by freediver Budimir Šobat in 2021. He beat the next-longest breath hold by just 34 ...

We don't know exactly how long she could hold her breath underwater, but she clearly pushed herself to the limit: She repeatedly ruptured an eardrum from the hours she spent in studio tanks.

If a gray seal started to get that panicky air-hunger feeling as soon as the saturation of CO2 in their blood started going up while they were holding their breath, they’d never get anything done.