[Nathan _in_Arkansas]

I’ve believed the same thing for about 20 years after studying how pressurized oxygen speeds up the healing process of burn victims and eye injuries.

The regeneration caused by those chambers was measurable, so it stands to reason that a higher O2 concentration in the atmosphere could result in the long lives of the first people and their decedents.

[numberonepal]

Not only is there more O₂, the air is more dense. Maybe dense enough to push O₂ directly into the skin like in a hypobaric chamber.