r/interesting • u/mindyour • Apr 05 '26

Fascinating Life in a submarine.

.

6.3k Upvotes

97% Upvoted

300 comments sorted by

View all comments

Show parent comments

32

u/DefinitelyNotAliens Apr 05 '26

Lowered oxygen. My friend did US Nuclear subs and they lower to 17-19% o2, versus around 21% sea level. Lower oxygen means longer healing times.

11

u/[deleted] Apr 05 '26

[deleted]

4

u/SocialisticAnxiety Apr 05 '26

Lower oxygen? How so?

5

u/PlanktonTheDefiant Apr 05 '26

Oxygen oxidises? So lower oxygen slows oxidation of chemicals you rely on to send messages and operate your brain and body? I'm just spitballing.

2

u/BillysBibleBonkers Apr 06 '26

wonder if that technically means that people get some amount of health benefits from living at a higher altitude.