World News

22032 readers

146 users here now

Breaking news from around the world.

News that is American but has an international facet may also be posted here.

Guidelines for submissions:

Where possible, post the original source of information.
- If there is a paywall, you can use alternative sources or provide an archive.today, 12ft.io, etc. link in the body.
Do not editorialize titles. Preserve the original title when possible; edits for clarity are fine.
Do not post ragebait or shock stories. These will be removed.
Do not post tabloid or blogspam stories. These will be removed.
Social media should be a source of last resort.

These guidelines will be enforced on a know-it-when-I-see-it basis.

For US News, see the US News community.

This community's icon was made by Aaron Schneider, under the CC-BY-NC-SA 4.0 license.

founded 2 years ago

MODERATORS

North Korea ramps up preparations for war with US (www.newsweek.com)

submitted 9 months ago by throws_lemy@lemmy.nz to c/news@beehaw.org

22 comments fedilink hide all child comments

you are viewing a single comment's thread
view the rest of the comments

[–] Siddhartha-Aurelius@kbin.social 15 points 9 months ago (1 children)

There are ways of creating oxygen onboard submarines. The only real limits to time submerged is the amount of food the boat can carry.

Here is a video by Destin from the Smarter Every Day youtube channel explaining oxygen generation onboard submarines. https://youtu.be/g3Ud6mHdhlQ

[–] acockworkorange@mander.xyz 5 points 9 months ago (1 children)

I think it downplayed the importance of CO2 scrubbing, because we can tolerate low O2 a lot easier than high CO2. High CO2 is also what gives us that suffocating feeling.

It briefly touches on rebreathers near the end. The theory behind them is that the difference between the %O2 on the inhale and exhale of our breathing cycle is very little. So if you can get rid of the CO2, you can re-breathe that same air for a "long" time before it starts to get too low in O2 content and it starts to impact your survivability.

[–] intensely_human@lemm.ee 1 points 9 months ago (1 children)

High CO2 may be what leads to that suffocating feeling, but low O2 is what makes us literally die

[–] acockworkorange@mander.xyz 1 points 9 months ago

CO2 is literally toxic. As in, if you're stuck in a hermetically sealed chamber, you'll suffocate to death due to CO2 toxicity, not lack of O2.