Could You Survive The Devonian Period? (with Hank Green!)

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By the end of the Devonian Period, the land had exploded with plant life and ancient invertebrates. There was also Tiktaalik - one of the first known vertebrates able and willing to move from the water to land. Our distant relative figured out how to survive in this dramatically different environment, can you?
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1 окт 2024

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Комментарии : 354

@eons 15 часов назад

We’re publishing the Eons podcast right here on RU-vid during our off weeks! As usual, we’ll be back with another regular Eons episode next week.

@DreadDeimos 9 часов назад

Great format, immaculate vibes!

@victoriaeads6126 6 часов назад

I really like this. The vibe is as fun as Tangents, but much calmer. It's excellent listening.

@victoriaeads6126 6 часов назад

Ichthyonian.

@wordytoed9887 3 часа назад

Was literally just scrolling through podcast feeds bored the other day and I saw Eons Mysteries of Deep Time and was sad it’s over with. This podcast and format is a welcome change, I quite enjoyed this. Thank you!

@badabing3391 3 часа назад

so peak

@branominal 15 часов назад

Expectation: deep scientific discussion on whether survival is possible Reality: deep scientific discussion on whether survival is possible, and also Hank and Kallie licking everything to see what gets them high

@one_field 10 часов назад

I'm here for it.

@magnolia1253 6 часов назад

Realistically, implausible. Most toxic amphibians got their hallucinogens to prevent getting eaten. This is too early in history for toxic skin secretions to be common. The mushroom issue is more likely though...

@borttorbbq2556 4 часа назад

True I'm down

@sksk-bd7yv 2 минуты назад

Well, mammals do 💚 the buzzzz. Only to be expected.

@PeloquinDavid 16 часов назад

Vitamin C deficiency is a primate thing: most animals make their own. Our ancestors lost the ability to make vitamin C because they were REALLY into fruit and weren't under selective pressure to make their own: use it or lose it...

@Hi_Im_Akward 14 часов назад

I'm not sure it's a universal need in all living organisms though. She was saying they aren't sure if it was actually a need during that time because there isn't evidence for it.

@adsventuresome7511 14 часов назад

So the phrase use it or loose does not apply to evolutionary theory and is more attributed to Lamarckism. It is not apart of Darwin's evolution. The reason primates lost the ability to produce vitamin c is way more complicated and comes down to random chance, both because of mutation and what individuals evolved the trait lucking out. You could also apply ocum's razor and explain the existance of a slight evolutionary advantage through some form of genetic mutation. Maybe the animals that didn't produce the viatamin c used slightly less calories? TLDR, not loose it or use it, random chance evolution compensated for by dietary advantage. There is a difference.

@adsventuresome7511 13 часов назад

@@Hi_Im_Akward he said most animals for a reason though, which is pretty valid. But you probably are correct about the scientific logic.

@whenthingsfly4283 11 часов назад

The actual weird thing is there's an evolutionary benefit for us not producing vitamin C, I just don't remember what it is... Something to do with the high concentration of urea in our blood compared to other primates I believe.

@InfernosReaper 9 часов назад

@@adsventuresome7511 Too much of C is bad for you. If you're eating a bunch of fruits with it, it suddenly becomes in your best interest to not produce it anymore. It's not too different from generations of adapting to poisons, or spices

@Ms.Pronounced_Name День назад

I could absolutely survive right up until something killed me.

@astaldogal 15 часов назад

Dude, same! I know I could 100%

@batsman27 15 часов назад

That is true, getting killed really makes you ded

@wolfeesmom 15 часов назад

me too!

@alcidesfy 14 часов назад

I would suvi.... "arachnids, scorpions.." Nope, ded.

@K4lamazu 14 часов назад

That would be accurate even for today’s era

@marcbelisle5685 15 часов назад

My ancestors survived the Devonian Period.

@K4lamazu 14 часов назад

Scientifically accurate

@DreadDeimos 9 часов назад

"My ancestors are smiling at me, imperial! Can you say the same?"

@bobbun9630 8 часов назад

At least long enough to pass on their genes. After that, they died, mostly still in the Devonian.

@brocklindseth7278 6 часов назад

I survived the 80's. Check mate.

@TurdBoi-tf5lf 4 часа назад

@@brocklindseth7278 I survived 2020

@bearhustler 15 часов назад

The London NHMs former Trilobite specialist Richard Fortey once ate a horseshoe crab as it was the closest he'd ever get to eating a trilobite. He said it was repulsive : )

@norarivkis2513 7 часов назад

Clearly, there were a great many things which felt that trilobites were very tasty, or they would never have had to evolve those shells.

@Skybuilt 2 часа назад

I love this. A fun way to make the reality of each period sink in

@kayc_x3 2 часа назад

Kallie, i was just checking out your LinkedIn to learn more about you, and saw that you were a consultant for the Walt Disney Company during the creation of the Dinosaur ride at Animal Kingdom. I have always loved that ride and especially those exhibits. What a small world (…after all 🎶)! They’re closing Dinosaur soon so go see the work Kallie contributed to while you can!

@ShreenathTewari 13 часов назад

Call me sentimental, that intro, the first minute or so and I'm hooked Beautifully written, I like science communication with a poetic touch

@johannaverplank4858 4 часа назад

It’s mind-blowing to think about the sheer number of creatures that had to survive and evolve over millions of years to lead to each of us. Every single fish, tiny mammal, and countless other life forms endured countless challenges, passing on their survival instincts and traits, all culminating in us being here today. It's like an unbroken chain of life stretching back through time. 🤯

@Jacana66 3 часа назад

I don't know if I'll ever have kids but if I don't, it's so weird to imagine I'll be the last member of this enormous chain of living beings that lead to me. Insane

@jaysonparkhurst7422 5 часов назад

I appreciated the 2nd-person story time at the start 🤤❤ asmr gold to me

@_maxgray 35 минут назад

I've been begging for Mysteries of Deep Time to come back, so I had mixed feelings when I heard the Eons podcast was coming back in a different form. While I'd still love to have more Mysteries of Deep Time, this was delightful in its own right - brava, Kallie and team!

@DeRien8 2 часа назад

That, "distributed by PRX" got me excited about the possibility of one day finding someone from the Eons team speaking on a PRX feature on NPR! I would *love* to hear one of y'all presenting for a Science Friday program

@dorothymccomb2244 6 часов назад

Now I need a shirt reading "Big Dry Land Fish".

@laurendouglas6452 16 часов назад

"Don't step or lay on a scorpion"- so survival advice just doesn't change then 😂

@magnolia1253 6 часов назад

Except that now it also includes rattlesnakes and assassin bugs. As well as poison ivy. Great thing about the devonian, no poison ivy

@ThaRealChuckD День назад

You better like eating fish. 😊

@georgebetrian676 День назад

But don't eat Tiktaalik. They are our ancestors.

@brianreddeman951 День назад

I dunno. You could supplement your diet with arthropods, shellfish and early tetrapods. Depends on what they ate. Mmmmm...swamp muck flavor!

@NicholsonNeisler-fz3gi 16 часов назад

@@brianreddeman951nothing like tetrapod on a stick!

@aliakseimemelau3 11 часов назад

@@georgebetrian676 Eating your literal grandgrand...grandparent might have unknown consequences.

@StuffandThings_ 9 часов назад

There were also the earliest of seed plants (hence probably some edible seeds) and plenty of greenery to go around. You'd be best off in an early river delta in Euramerica.

@ikopi56 13 часов назад

There's a problem with the comparison of O2 concentrations then and in Aspen. I spent 32 years as a Respiratory Therapist, six of which were in Leadville, CO which is at a higher elevation than Aspen. The percentage of O2 in the atmosphere does not change until much much higher up in the atmosphere. However, the pressure exerted by the atmosphere, which is actually how O2 gets into the blood of air-breathing mammals does decrease significantly with increasing elevation. That is why it is harder to breathe at elevations above 8500 feet above sea level. An O2 percentage of 15% is about 3% below the absolute minimum needed for human survival. You'd die of hypoxia, in minutes, probably before you could register the temperature.

@JGuraan 8 часов назад

Exactly. Was going to comment as well. It's neither overall atmospheric pressure nor gas fraction of oxygen that's important to our respiration, it's specifically partial pressure of oxygen (discounting that you also don't want certain other gasses to have too high a partial pressure). That said, especially in the Late Devonian, we have evidence to indicate that there were significant fluctuations in oxygen fraction over time, with geological measurements at the Frasnian-Famennian (~372Mya) Boundary supporting a likely case for an atmosphere closer to 25% O2, which is high, but still human-safe at 1atm, at least for a while. And while the O2 fraction changed rapidly on a geologic timescale, it would have been many, many millennia between the extremes, so you could certainly find a time where a human could survive without respiratory distress.

@bobbun9630 8 часов назад

I believe what they're attempting to say is that at sea level, a 15% partial pressure of oxygen is the same partial pressure that would exist at Aspen at 21%. The wording they used is fairly awkward. I don't know if that fixes your issue or not. It's not clear to me if that's a decent assumption, though, because they didn't really talk about atmospheric pressure, only oxygen concentration as a volumetric percentage and didn't discuss total atmospheric pressure from what I heard.

@andrewfleenor7459 5 часов назад

Yeah, I think she was talking about partial pressure the whole time. But I'm having trouble finding sources on what the average pressure is at Aspen. Ed: ok, Aspen is at 2.4km above sea level. Air pressure, therefore partial O2 (?), is about 75% there what it is at sea level. So that doesn't seem so far off from being equivalent to reducing oxygen fraction by 3/4 in a sea-level atmosphere, i.e. from 21% to 15%? Unless I'm missing something, which is very possible. That's probably what she was referring to, though.

@AncientWildTV 3 часа назад

yeah, at higher altitudes, like Leadville or Aspen, while the percentage of oxygen in the atmosphere remains around 21%, the atmospheric pressure decreases. This lower pressure reduces the amount of oxygen available for the body to absorb, which is why many people experience difficulty breathing at high elevations.

@Wookeyehandtechihhila 3 часа назад

Wow, dream come true! I have been imagining an amazing film about human beings going back through time travel from Hollywood but I think this is even better. Not lost by Hollywood but detailed by scientists with lots of options for imagination. Thank you so much!

@mlebrooks День назад

I'm barely surviving this one

@TheSiameseDreamer 14 часов назад

😂

@wubbalubbadubdub7882 11 часов назад

REAL

@norarivkis2513 7 часов назад

Pretty much guaranteed that you're not going to survive all the way out of the Holocene, although if you're lucky your descendants might.

@EtakehOh 4 часа назад

Coincidentally, I'm one episode in to "Your Inner Fish" on Kanopy - in the first part, they discussed the finding of the tiktaalik - and being super excited about their hands, and how they were still attached so they could see how similar they are to human.

@_maxgray 15 минут назад

People are complaining because Hank forgot the Devon that the Devonian is named for is a ceremonial county, not a town. But look, the US has towns bigger than Devon's 2,590 sq. miles. (Ok, fine, if you're strict about city limits, there are two, both in Alaska. But if you count metro areas, there are a lot!) Point being, not knowing a county vs. town in a foreign country is not really surprising or upsetting, especially when it's not a particularly big area.

@EmilySmirleGURPS 13 часов назад

Parasites are going to have a time with you being so high temperature inside, when they're used to fish and fishapod pre-amphibians. That also protects us from fungi, who otherwise are opportunists. It's not foolproof but it helps. We have millions of years of anti parasite evolution in our immune system, beyond what the devonian parasites have dealt with.

@Silverbirchleaf 13 часов назад

Stay in the water, tiktaalik! It's not worth it!

@theunknownunknowns5168 День назад

Devonian tree sized fungi! Yum! Take some ingredients for creamed mushroom on ciabatta toast.

@MossyMozart 16 часов назад

No wheat. >_< No milk-making mammals. >_

@vampyresmiles713 15 часов назад

@@MossyMozart That's why you take them with you from our time

@SentientSingularity 15 часов назад

I’m struggling, just to survive the Holocene Period.

@magnolia1253 6 часов назад

Same

@DJFracus 3 часа назад

You will not survive the Holocene, because you will die before the Holocene is over.

@rodchallis8031 15 часов назад

I live on top of Devonian bedrock. If I go east, I will encounter Silurian, and if I go even further it changes to Ordovician. Finding coral fossils here isn't difficult, they're all over. Because of glaciation, however, I'm never 100% sure if they're from the Silurian or Devonian periods. And, it's little use to look at the corals to get a clue, most if not all existed in both periods-- and some are still alive today. But since I'm on Devonian bedrock, and the fact that the Silurian period was rather "short" compared to others, I think Occam's razor cuts the Devonian way.

@brocklindseth7278 6 часов назад

I'm jealous! I have no doubt that it's a beautiful area.

@wyvern723 6 часов назад

So jelly! That sounds really cool!

@kevinsmith9013 День назад

Short answer: no Long answer: probably not

@Brian----- 9 часов назад

6:40 Many periods are named after western England and Wales probably because much early formal geology was done there. The Cambrian is named after Cambria (Wales), the Ordovices and Silures were Celtic tribespeople of Roman era western Britain, etc.

@jeremysmith4620 12 часов назад

Hot Tiktaalik on Tiktaalik action? Can I find that on Devonly Fans?

@aplaceinthestars3207 3 часа назад

I'm so glad they brought up vitamin C, because that was the one question eating at me from the beginning of the show. The tricky thing with food is how simplistic it is to be 'fed', but still subject to life-threatening nutritional deficiencies. I like how the question of "can I eat it?" could lead to a better understanding of ancient food webs.

@camilomartinez1747 Час назад

THIS VIDEO IS MY BIRTHDAY GIFT, THANK YOU 😍

@stevedixon9734 3 часа назад

I can’t wait to sleep to this series. Would love to see the Silurian too. Cooksonia and the rest of the landscape sounds like a fever dream

@GRILL332 13 часов назад

The % of o2 is the same at aspen at about 20%. It’s the pressure that’s less. 15% sets off alarms for o2 sensors. It’s bad.

@nickschindler193 2 часа назад

Watching Kallie narrate is so cool!!! Glad the podcast is back ❤️🧡💛💚💙💜

@hab0272 Час назад

What an educative and fun discussion!

@joehopfield 14 часов назад

Kallie, I really love the rhythm and feel of your intro.

@ExburneLightDarkness 42 минуты назад

If I could travel back in time to the Devonian, I would definitely take a bunch of awesome photos of Prototaxites. Then I would probably harvest some spores and/or hyphae in order to grow it in my present-day garden whenever I decide to return home!

@highfive7689 15 часов назад

Thank you for making this presentation. The one thing I really took away was think twice about what you lick in the Devonian! LOL. What I would like to ask is if EONS would make an episode about the first time trees and plants experience cold, and when they evolved mechanisms to cope with it. Love you guys!

@stevedixon9734 2 часа назад

This is already my favorite series. Would love to see more paleoart throughout

@AZombieWizard 7 часов назад

Have scientists considered time travelers bonking fishapods on the head as a contributing factor in the end Devonian extinction?

@kyjo72682 3 часа назад

Oh wow! Aspen really has just 15% effective oxygen concentration! I just looked up an altitude to oxygen chart and I have to say the fact that it drops off so sharply is a complete surprise to me..

@theflyingdutchguy9870 4 часа назад

imagine being teleported to this time period. i would have the day of my life checking things out and bejng amazed untill something kills me. sounds like a decent way to go

@dizzytitan8481 16 часов назад

Love how we had an dnd amphibian session

@kennethcarter3494 16 часов назад

Town of Devon? Devon is a county.

@R_V_ 9 часов назад

Oh, those Yankees...

@jwr6796 3 часа назад

This changes everything

@SonLucasX 5 часов назад

This was extremely fun hahahaha, bring more videos like this!

@caseyleichter2309 11 часов назад

This is great! I thought the Cretaceous was the earliest a human could survive on Paleo-Earth (mostly bc there would be seeds, nuts and fruit by then) though getting eaten by a dinosaur is a huge potential downer. But if scurvy takes a while to develop, I would love a short jaunt to the comparatively Edenic Devonian Era.

@Zavult 14 часов назад

I wouldn't count us out on surviving this time period entirely. I would be willing to bet that there was some kind of plant out there that had the vitamin C we would need. Also Plants were new and had yet to be preyed on buy most animals so you wouldn't have to worry too much about the deadly poisons most plants nowadays have. Though i wouldn't count out an upset stomach or diarrhea while you were sampling the Devonian salad bar.

@matthewvonbargen9450 8 часов назад

I love how they admit that a curiosity is “can these ancient plants/fungi get me high” because that is the most human things I have ever heard

@himanbam 2 часа назад

I think I could definitely survive the Devonian period (with Hank Green)

@lauraisenbuch5130 12 часов назад

The hour listening to this felt like 10 minutes. Please continue this it was so entertaining.

@NicholsonNeisler-fz3gi 16 часов назад

I want a pet Tiktaalik and I would name him Devon.

@kayc_x3 2 часа назад

17:36 “I am your destiny” 😂

@fpoggesi 8 часов назад

If Hank is angry at the Devonian for being named after Devon, England, I hope he doesn't think too hard about the Jurassic...

@hive_indicator318 3 минуты назад

It was named after Uranus, of course

@KyloRenRadio 15 часов назад

In your introductory 2nd person scenario, right after "you see a tidal pool" is the perfect Choose Your Own Adventure moment. "If you decide to rush to the pool for a drink of water, go to page__" "If you choose to wait and observe the terrain for a moment, go to page__."

@MissSimsalot 12 часов назад

I judt remember reading a book like this but not about historal times and now I want to know what book that was

@fartpimpson3843 7 часов назад

I was thinking this would answer if Hank Green specifically could survive the Devonian

@Darth-Nihilus1 15 часов назад

I feel like I would starve from malnutrition. It would be weird with nothing flying around and probably some bugs are making noise. Centipedes and scorpions will probably get old after trying to eat them for every meal

@RdDeath12 2 часа назад

"sex sells" "watch your ancient ancestors do it" lol

@basithardimasqi6751 16 часов назад

How long was the day back then? If it's less than 24 hrs then adapting to an entirely new circadian rhythm would be the biggest challenge.

@dheemanrajkhowa2866 15 часов назад

Bruh, people at the north pole literally have months with either 20 hrs of daylight and vice versa. You'd survive.

@greebler_elf 14 часов назад

The devonian had roughly 22 hour days. People with circadian rhythm disorders can be farther off cycle than that and cope

@AncientWildTV 3 часа назад

adapting to a shorter day would certainly challenging for any organisms

@Badpoison1 8 часов назад

Temperature is the 4th thing you need to worry about. Luckily this period has a temperature that is hospitable to us. However, if you're time traveling the Earth has not always had a temporary that is hospitable to us in general

@tenebrousoul9368 День назад

Yes, yes i could.

@seekingsomethingshamanic 14 часов назад

This is such an interesting time period to be speaking of, in the devonian period there was also massive fungal structures called prototaxites. I always wonder if prototaxites was edible or not to creatures like tiktalic, or did by thatpoint fungi start actively making biological compounds that would be anti insect. I for some reason take great joy in thinking about taking a big old bite out of prototaxites.

@norarivkis2513 7 часов назад

Tiktaalik was a carnivore, so nope. But they might've been edible to things like millipedes.

@seekingsomethingshamanic 7 часов назад

@@norarivkis2513 ooooo fascinating imagine a fungal powered milipede eaten by a tiktalik and getting sick from underdigested fungal matter. i wonder if the fungal tissue would clone itself on the wet earth

@magnolia1253 6 часов назад

There are trunks of prototaxites with bored worm holes. Things ate them.

@seekingsomethingshamanic 4 часа назад

@@magnolia1253 i just am curious what it would feel like to take a bite of a big ole mushie bigger than my head

@firstcynic92 14 часов назад

35:07. If there's a plant with leaves like a banana plant, you can make a bowl out of that and boil water in it.

@vitabricksnailslime8273 3 часа назад

You can't call it the Fishopodium. That's the place where the fish go to display their feet!

@Silverbirchleaf 13 часов назад

Woah woah woah, come visit the COUNTY of Devon before stealing its geological period. Poor Devon.

@maxximumb 10 часов назад

With only 15% oxygen wildfire shouldn't be a problem. Hypoxic air fire suppression systems are a widely used technology, in Europe, to protect buildings where humans have to work but fire would be a really bad thing. Places like the UK's British Library use this system so that there is no risk of water damage should a fire need to be extinguished and the use of halon or other inert gas would be hazardous to the people working there. A fire needs around 16% oxygen to sustain or start burning fuel. I wonder if the fuels contained their own oxidiser and that is how wildfires could occur?

@AncientWildTV 3 часа назад

do you think this understanding of fire dynamics could influence wildfire management strategies, particularly in areas experiencing increased temperatures and drought?

@loraliefinlay8681 5 часов назад

I love her voice, it's so soothing and calm

@trishcomey6322 3 часа назад

Love Kallie’s voice. I would listen to her read or talk about anything.

@Killercreek 7 минут назад

You can create wooden pots and put hot rocks in to boil things

@gerardtrigo380 13 часов назад

They Cambrian, Ordovician and Silurian were named after tribes or regions in England where the rocks were described. The Cambrian was named after an area or people called by the Romans the Cymbriu in Wales. The Ordovician was named after another Welsh tribe called the Ordovices by the Romans. The Silures, another Welsch tribe gave their name to the Silurian. The Devonian got its name from the non-Welsh town of Devon which is in Devonshire. The Carboniferous was named in the US after the coal bearing strata throughout the eastern region, it is more properly broken down into the Mississippian and Pennsylvanian periods. The Permian is named after a region of Russia where the rocks were first described.

@magnolia1253 6 часов назад

And the ediacaran period is named after the Ediacara hills in Australia.

@AncientWildTV 3 часа назад

do you know any challenge arise from using culturally or regionally specific names for geological periods?

@gerardtrigo380 2 часа назад

@@AncientWildTV No, and I cannot think of any reason why there would be.

@rickybryan1759 Час назад

Trust Hank to step on our one ancestor

@alonzogarbanzo 10 часов назад

How ya doin' PIttsburgh? We're The Big Dry Land Fish...

@alonzogarbanzo 6 часов назад

...we changed our name from Walking Planet...

@magnolia1253 6 часов назад

It's interesting, because the FIRST concern I had for this hypothetical was the lack of vitamin C and digestible starch. The main reason I understand this nutritional hazard is from the channel called History of the World which discusses deep time in great detail. They did an episode about a time traveler trying to find the earliest time humans could comfortably live. They said late Cretaceous because that's the soonest we'd have fruits we could digest. Before then it would be nearly impossible. Also, 18° is too cold... I need something at least 25° to 30° to be comfortable.

@erltyriss6820 12 часов назад

At 15% oxygen in the atmosphere, a human is going to develop hypoxia rapidly. Most of the quick numbers I am finding places the lowest limit is 19.5% oxygen for human survival.

@AbqDez 13 часов назад

We are made of Star Stuff & Planet Poop!

@danielv5825 13 часов назад

Up until the carboniferous, what was the CO2 level like in the Devonian? Given that this was before the long-term storage of carbon in fossil fuel deposits, I'd be wary that the carbon dioxide level may be a few whole percentage points, close to the highest we could tolerate.

@JDeO1997 16 часов назад

Maybe long enough to be eaten by something

@jeffreybongos4837 10 часов назад

Hank is right. Why would oxygen levels fall with altitude? Ratio remains the same, just less pressure.

@boxsterman77 9 часов назад

They could have found the rock in Kalamazoo. Then it would be the Kalamazoonian era with its Kalamazoonian zoophytes.

@devincherry6891 8 часов назад

I want to design a "clubbin' in the Devonian" t-shirts with a little hank green with a club getting ready to whack a Tiktaalik...

@culwin 10 часов назад

To be fair, I think most people today would not survive long in any period (including the current one) without other people.

@XD152awesomeness 15 часов назад

That intro was magical

@Skukkix23 11 часов назад

That intro brought me tears. I don't even know why. The voice and rythm absolutely encumbered me

@stefansauvageonwhat-a-twis1369 11 часов назад

Seeing em makes me giddy, fun little nerd chat I know Silurian is cause of Wales, like Cambrian hehe

@jxn314 9 часов назад

If you want to count views on a time travel video consider how many hours grad students and researchers would have to spend pouring over the footage.

@leechild4655 6 часов назад

If the Devonian doesn`t have internet I would die.

@dwayne_draws 4 часа назад

Love listening to you guys, but I do have to ask what's up with the earth at 11:25 :D

@moocowpong1 12 часов назад

Hank, that one you ate wasn’t your direct ancestor because you ate it. It was a distant uncle at best.

@HenrikGJ 13 часов назад

That was really fun, I always enjoy seeing Hank Green again

@cameronwilsey9334 5 часов назад

Hope you don't get allergies to all the spores that must have been in the air

@matthewgordon3281 12 часов назад

So, we would be ok in the Devonian until the scurvy sets in.

@onlopine 11 часов назад

0:26 This is the worst guided meditation ever

@thedak7419 7 часов назад

I'm so happy to see Hank again, missed him hosting!

@fr57ujf 15 часов назад

Humans can only survive in a small range of atmospheric oxygen - from 19.5% to 23.5%. Oxygen during the Devonian ranged from a high of 26% to a low of 13%. Oxygen in a range survivable for humans only existed for about 20 million years - from 410 mya to 390 mya.

@TabbyFeral 11 часов назад

thats not technically true, i looked it up. 20% oxygen at high elevation is equivalent to 15% sea level😊

@paulgaras2606 11 часов назад

There are people who have climbed Everest without oxygen so humans are at least capable of becoming adapted to as low as 7%oxygen for periods

@aninewforest 11 часов назад

@@paulgaras2606You'd need denisovan genes to survive high altitude life. So if you're a Tibetan.

@fr57ujf 8 часов назад

The record for time spent in the Mt Everest death zone (above 8,000 meters) is about 21 hours without oxygen. A major evolutionary adaptation like tolerance to low oxygen levels would take thousands to millions of years. The scenario we're discussing is dropping modern humans into the Devonian. They could not adapt and would die.

@hgtvmthfckr 4 часа назад

hank looking so handsome

@Devin_Stromgren 3 часа назад

Climate is a major concern long term. There aren't any animals to make insulating clothing from.

@geofflau4215 53 минуты назад

I propose the Piscinian!

@devindaniels1634 10 часов назад

Altitude will change air pressure, but the atmosphere contains 21% oxygen everywhere. You will breathe in about 25% less oxygen in Aspen, but critically it won't be displaced by other gases because there's 25% less of those too. 19.5% oxygen is about the lowest safe oxygen level for people, regardless of air pressure. Unfortunately we would not survive 15% oxygen. Still a great video!

@andrewzcolvin 2 часа назад

Having experts would make this significantly more valuable.

@sarielle85 12 часов назад

The question is: Could the Permian period survive me? What if the Great Dying was actually caused by germs, viruses and bacteria, that a time-teavelling human from the future had brought with them?

@borttorbbq2556 4 часа назад

Probably though vitamin c would be hard