A time traveler’s survival guide. The vertical green bars are the only times in Earth’s history with enough oxygen to breathe (hypoxia) and low enough to avoid oxygen toxicity (hyperoxia):
That blue bar is extremely pessimistic. Humans can survive pretty well with 15% oxygen, and do so in several places in the Andes mountains, China and India. I wouldn’t recommend doing it without lengthy acclimatizing, especially not considering my last paragraph, but it’s completely survivable by itself.
Humans also don’t really have a problem with 25% oxygen, although that will definitely bring down the life expectancy.
On the other hand, note how those pointers talk about giant insects, megafauna and other scary things. Those are a much bigger problem than the air you’re breathing.
To add to this: At 3’500 meters above sea level, the pressure is down to 2/3 atmospheres. So instead of 21 kPa of oxygen partial pressure, it is only 14 kPa. So like breathing 14 % oxygen at sea level. People live at that height.
A time traveler’s survival guide. The vertical green bars are the only times in Earth’s history with enough oxygen to breathe (hypoxia) and low enough to avoid oxygen toxicity (hyperoxia):
https://fedia.io/media/cache/resolve/entry_thumb/fa/a9/faa97017c09ebf7d9543fece447951844e5cfbdaa9f491c95763102e987ffc59.jpg
That blue bar is extremely pessimistic. Humans can survive pretty well with 15% oxygen, and do so in several places in the Andes mountains, China and India. I wouldn’t recommend doing it without lengthy acclimatizing, especially not considering my last paragraph, but it’s completely survivable by itself.
Humans also don’t really have a problem with 25% oxygen, although that will definitely bring down the life expectancy.
On the other hand, note how those pointers talk about giant insects, megafauna and other scary things. Those are a much bigger problem than the air you’re breathing.
To add to this: At 3’500 meters above sea level, the pressure is down to 2/3 atmospheres. So instead of 21 kPa of oxygen partial pressure, it is only 14 kPa. So like breathing 14 % oxygen at sea level. People live at that height.
why?
Oxygen is really rough on the DNA due to making the cells “rust” which hampers cell division and/or increases risks of mutations or cancers
So those memes that were “warning” that oxygen was dangerous because it created rust in metal rods is actually true ??
Yeah, and for the same reason it rusts metal.
https://www.harvardmagazine.com/sites/default/files/html/1999/03/health.html
https://en.m.wikipedia.org/wiki/Oxidative_stress
https://scitechdaily.com/researchers-discover-how-too-much-oxygen-can-cause-lasting-health-problems-in-humans/
Is there a higher resolution version?
Is there a version with more JPEG?
Is there a version which actually loads?