"No parenting class would have ever prepared me for having my kid ask me why we don't need artificial oxygen storage."
No, but a grade school science class would have...
"No parenting class would have ever prepared me for having my kid ask me why we don't need artificial oxygen storage."
No, but a grade school science class would have...
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.
Dumb question, but in a very oxygen rich environment, can you just breathe through a paper bag or something? Mostly just breathe your own exhaled CO2 with a bit of O2 leaking in?
I'm super skeptical of this.
You don't get oxygen toxicity, even breathing pure oxygen, unless you're under significantly more pressure than atmospheric pressure...
So either this graphic is wrong/misleading, or the atmosphere was more than double current pressure for most of earth's history... Which I'm pretty skeptical of.
Is there a higher resolution version?
My grandfather would tell stories of how the planet used to be covered in plants and you could breathe the air outside. Back when the sky was blue.
Where is this from ?
It is (I hope) an original. Though the form "my grandfather would tell stories" might be bordering on cliché.
I have a feeling that I read this before somewhere
Especially the "Back when the sky was blue" part
Sounds to me like Dad needs a little credit here.
Even if you arent good at improv "Thats a good question! I'm not sure, we should look that up!" Is an easy go-to.
Then after shower and get into bed we look up todays questions.
First off, weird to point out that they're "age appropriate"
If your kid reads above the age level and understands it that's generally a good thing
Number two I don't get why this is such a weird concept on how to explain things to a child. Seems pretty normal and "age appropriate"
Not only that, it'd be better to ask the kid why oxygen tanks are needed on spacecraft, then ask why we don't need them here on earth.
It's a weird post, in general.
Get some perri-air

So, where do I find this dad, as opposed to, "Dunno, ask yer mom, and fetch me a bud light coors."?
They're what you call "nerds."
So, Lemmy. Lemmy is where you find one.
Isn't the ocean that produces most oxygen?
Yes, the ocean grass
I'm very disappointed there was no praise for dad at the end of all that.
We don't do that.
My kid is twenty three years old. I raised her alone. Crazy, I know, but she and I are pretty close.
To this day, I get dozens of adulating text messages on mother's Day for "playing both roles."
On Father's Day, total utter crickets except from my daughter herself.
Fathers are here to donate sperm and fund other lives. That's it.
Happy belated father's day, from someone who is glad you made this comment. I appreciate you highlighting this issue, because this is something that is sorely lacking in progressive discourse; it's getting better, I think, but that is likely due to people like you helping people like me to understand how caring fathers are usually not respected or appreciated by the world. (Edit: like you say, "appreciation" towards fathers is usually limited to financial support, which completely ignores the vast majority of what it means to be a father (and also marginalises full-time dads whose partner is the working parent))
Never been a big fan of kids, but for some reason this post clicked with me. I think I get it.
Oh look, it's buzz-Killington.
"Not on this planet... yet."
Or if you want to go full crash course, "For now, but that hasn't always been the case and might not be in another million years" and explain things like Oxygen Collapse/Great Oxygenation during the proterozoic when oxygen levels first shot up and killed off a ton of oxygen-hating things.
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