...And Then 1700 People Died.

[@jcortese3300]

I've never done diet coke and mentos, but when I was in grad school a couple of us put some liquid nitrogen in a 2 liter bottle and left it in the middle of the park at the center of campus. To be fair, we made sure no one was around, but yeah it was not the wisest thing a bunch of grad students have ever done. The cops that stopped by when they heard the explosion were unamused but thankfully didn't haul us in.

[@pvic6959]

and here i thought dry ice in a closed bottle was dangerous LOL

[@Return_To_Sender]

Diet coke doesn't use HFCS or sugar. They use an alternative so they can call it "diet".

[@Chrishelmuth1978]

@@Return_To_Sender yes. It's a calorie free alternative, which is what makes it diet lol

[@harrisonjohnson9792]

@@Chrishelmuth1978 "Calorie free" is marketing BS. The sweetener alternatives they use are just as bad, probably worse in fact, as just using sugar. It's not any healthier to drink diet soda than it is to drink regular soda.

[@eschdaddy]

Sounds like the MRE bombs we used to make in the Army. Throw that bottle in the trash dumpster and BBOOOOOOOOOOMMMM! Our First Sergeant was unamused.

[@VirtualRiot]

the song playing backwards at 2:54 took that joke from somewhat corny to hilarious, thank you 😂

[@annemariemattheyse808]

Oh my goodness. I didn’t even notice it! GENIUS

[@stormie909]

It wasnt that funny

[@theCodyReeder]

Co2 being released from pressure is cold. Those blisters are frost bite.

[@theredkey3288]

Genius, I doubt anyone would have thought of that

[@Surrenitie]

Maybe the water kept the co2 warm?

[@kunjupulla]

That's a good point

[@BlackBanditXX]

@@Surrenitie No, what he's saying is the change in state is endothermic - it absorbs energy in the form of heat - so it doesn't matter what temperature it starts at. If you've ever ran a can of compressed air, you've experienced this drop in temperature.

[@Surrenitie]

@@BlackBanditXX Yes, i know how it works, i was referring to despite that the higher up-none bonded water may have kept the co2 warm to an extent during this process. Anywho its just a theory

[@evonne315]

There's a phenomena called "olfactory fatigue" which is when you smell something for long enough your nose stops smelling. Not permanently, just temporarily until your removed from the smell and your nose readjusts back to normal. Sulfur is particularly quick to cause olfactory fatigue. So people can be tricked into thinking the air no longer smells bad, but really nothing changed thier noses just got fatigued. This is a dangerous thing and why no matter if a space smells OK or not, the air should be monitored by air monitoring equipment for proper safety.

[@User31129]

I think most anyone who's visited Yellowstone national park has experienced the phenomenon.

[@fuckwit107]

more commonly known as nose-blindness

[@salt-emoji]

Oooooooooh, okokok so the shape and size of sulphur bind more effectively to chemical receptors, like those found in the smelly bits (I'm a chemist not a biologist...) Which means they stay saturated for longer, and your body can only reset the receptors at a pretty static rate, also most strong smelly chemicals are just high sulphurous compounds anyways. Ps. I read this about 6 years ago, but anthropologists think this is an adaptation not a result of chemical or mechanical factors to aid early human ancestors in scavenging dead animals.

[@liampowers8570]

I wonder how this works with long term exposure. I smoke pretty often and have since found that I can barely smell it at all anymore

[@Strobie_one]

Your nose keeps smelling it, your brain ignores it

[@oumarh.gassama8063]

That face you make at 3:14 after whispering "That's the sound of water crying" will haunt me until the end of days. Thank you Joe. Just thank you.

[@mattanderson8737]

ASMR? BS? LOL

[@iam_crumb]

@@mattanderson8737 what

[@tadadoterson6147]

Pi

[@fontamufor8002]

As a cameroonian, I can confirm this is so true. People don't live around that area anymore. We say "lake nyos has belch" just so we insert some fun in this horrific situation. By the way, your pronunciation of lake nyos isn't correct but that's not an issue.

[@joescott]

I was more worried about “Mount Nyriagongo”. 😄

[@Edmond8634]

sorry this is off topic but I am planning a trip to Yoaunde and Douala, as a westerner should I have any safety concerns?

[@ababycow]

Should I advice a friend living around lake kivu to consider relocating?

[@fontamufor8002]

@@Edmond8634 those two areas are relatively safe as compared to the North West and South West regions, where there is still war. You can go to Yaounde and Douala. However, I am sure that your embassy will give you more info as to which places you shouldn't venture into and it will match my answer.

[@fontamufor8002]

@@joescott going back to lake nyos. one of the anecdotes use as a prevention against this toxic gas was drinking palm oil and rubbing it. I am skeptical if this saved some people, but this method is so popular a song has been made out of it. You might want to take a look at that. does palm oil prevent this suffocation? personally, i doubt it but it is worth looking into it.

[@kimatwood1770]

I first saw the Cameroon stories a few years back when James Cameron did a documentary on the biblical plagues of Egypt. The Nile ran red with "blood" (iron deposits), resulting low oxygen levels in the water caused fish to die, frogs left the water, and... all the first born Egyptian males died. It was thought that the heavy clouds of gas released form the Nile drifted into the low lying areas of the city. First born males were the heirs to the family assets and got to sleep in a special place in the home... the basements.

[@Pencil0fDoom]

So if the angel of death was a greenhouse gas, the blood on the lintels was a red herring. Got any scientific reinterpretations of the parting of the Red Sea?

[@KallePihlajasaari]

@@Pencil0fDoom Immanuel Velikovsky has interesting theories.

[@2112jonr]

@@Pencil0fDoom Could just be a work of fiction. It is the bible after all.

[@cherylm2C6671]

Coolest place in the house- and the deepest. They also got the first serving of the contaminated food. Doixides or sulfides- not a good day.

[@silvergreylion]

@@Pencil0fDoom Technically, the evaporation of CO2 from the Nile could've caused a red mist/fog to accompany it, and if their door frames were especially easy for fog to condense on, that would've caused them to drip with red-brown water, looking like blood had been sprayed on it.

[@deljayniecorp]

I am Cameroonian and this still brings chills even now. I have tried to explain it to several people I know, but there is still skepticism among people here about what happened. The name is lake “Niyos”

[@ababycow]

Should I advice a friend living around lake kivu to consider relocating?

[@deljayniecorp]

@@ababycow if appropriate measures have been taken, then there is no need to panic. However living close to a lake that is deep and large is risky as it’s never known when the pressure will fall.

[@TheCardinal365]

Here i was thinking 1700 people died from dumping mentos into diet cokes?...

[@clubsport9334]

You an me both mate.

[@_D_P_]

I wonder what the death toll is. Surely it can't be zero.

[@storyboardbray3564]

Same

[@homesoundsgood7211]

Yeah, was wondering how many people succumbed to my home schooling volcanoes...😅

[@MyNathanking]

3:37: "...but it can also happen in nature." Without watching anything beyond this, I know EXACTLY where you're going with this. There's only one possibility: The Lake Nyos eruption.

[@-Brickbro1]

Yep

[@zakiducky]

So much death, and yet not a single fly nor a single sound. I can’t imagine how horrifyingly apocalyptic such a scene must’ve been. It’s like everything in the area just got simultaneously raptured and dropped dead. It’s the type of event we would have called biblical if it happened and was written down before modern science. Next level scary shit.

[@abhishekconstantinewinches9907]

It's still Biblical.

[@tirushone6446]

This is one of those things that is just so mindblowing if you don't know the science people 1000's of years ago would have rightfully said that is was the act of a furious god if a lake just exploded and left a cloud of death behind

[@nepntzerZer]

It would of been awesome

[@ABC-vv4cm]

@Hattie Lankford just because there’s a chemical reaction for it doesn’t mean it can’t be an act of God or biblical.

[@SarahMc585]

@@ABC-vv4cmit’s sad how People are so discriminatory towards Christian people. Kindness towards us doesn’t exist. We are not acceptable to be part of society anymore. They wish we would disappear or die.

[@CyBirr]

02:54 OK, playing Under Pressure backward was art.

[@DavidCoxDallas]

Queen has many recognizable songs from just a few notes

[@euansmith3699]

One of my uncles was home brewing beer in a multi-gallon "beer bomb"; a spherical plastic container with a pressure release valve. He striped down the bomb and cleaned it, reassembled it, put his brewing mixture in, and left it. A week or so later, he discovered that he had reassembled the pressure valve back to front; when he came home to find an exploded beer bomb and a bedroom drenched in beer.

[@kerryarrant1523]

Loved this, I wish there was version where he explained it to insurance company and they paid him.

[@DoctorProph3t]

Lmao, never brew beer in a sealing container. Loose lid only.

[@BlackShardStudio]

"April F-" *BOOM!!*

[@gl15col]

@Prof. Weed Isn't it possible to get a good tasting wild yeast? Something never before tasted?

[@gl15col]

Bet he read the instructions every time after that, p-u

[@Skittenmeow]

2:49 and my brain immediately fills in _"Ice ice baby"_ despite me being a massive Bowie fan. Mope 🥺

[@cynhanrahan4012]

I immediately got the Bowie, but you just put Vanilla Ice in as my newest ear worm I thought I'd left back in the 80s.

[@matthewwells2520]

6:00 "How do you add pressure?" Me: Send it to high school?

[@StevenBanks123]

I found out through personal clumsiness that diet versions of sodas are actually not sticky. This makes cleanup so MUCH easier.

[@PrincessFleur234]

That’s probably because there isn’t sugar in the diet versions

[@1011jdog]

Makes sense now explain works and aluminum

[@thesilentone4024]

Most of the stick is the corn syrup.

[@dstinnettmusic]

This was both a surprising yet super not surprising fact to learn.

[@ac.creations]

Diet soda is the dumbest thing. Drink water.

[@sylviegauthier2145]

I remember seeing the news reports when lake Nyos exploded, it was shocking to see so much death. I've since thought of it, on and off, as the lake that farts very deadly. I'm glad to see that measures have been taken to lessen its impact in the future.

[@tomfitzsimmons6535]

The rampant corruption in business and government might make it much worse. There's a PBS doc about that, a Nova I think.

[@yosoyyomismo9757]

what year was this happening?

[@thing_under_the_stairs]

@@yosoyyomismo9757 It happened in 1986. Everything awful happened in 1986.

[@douglasdietrich4174]

"Still a better love story than Twilight" One of the countless reasons why I really love you and your content. Thank you, Joe.

[@askmeaboutmyscrotum3527]

This is a pretty common saying around the internet

[@alexmerrin9634]

And that he photoshopped Nicholas Cage makes it even better.

[@craigpridemore7566]

I labelled it 'science humor' and quoted it to my son.

[@Zippythewondersquirrel]

Sparkling soda, it’s the soda of a killer Bella.

[@jamesbarbour8400]

There's a load of things better than 'Twilight' !

[@batteryacid1]

this subject is super serious but i cant stop laughing at the under pressure bassline why is it so comedic to me

[@AdamantineCat]

I was so confused when I though it was Ice Ice Baby.

[@depression666]

@@AdamantineCat well you’re not wrong it is the same beat

[@Oleandra-13]

@@depression666 I keep remembering that interview where Vanilla Ice was like "there's an extra TISH so it's a different beat!"

[@janemf]

That’s the literal point of comedy

[@Neojhun]

The baseline playing reverse for the dynamic equilibrium reaction is too awesome.

[@crisymakesnoise]

Did the coke and mentos experiment for the preschoolers i taught and the most iconic reaction I got out of them was "WOOOW!!! MILK COMES OUT?!?!" I was in tears😂

[@FirstnameLastname-jd4uq]

If my milk looked brown and bubbly i think i would return it…

[@N3gativeR3FLUX]

@@FirstnameLastname-jd4uq if it was only brown, chocolate milk. brown and bubbly. return it.

[@Roguescienceguy]

Back when I was young, I had this basement where I was conducting all sorts of experiments with lights, a non disclosed type of vegetation, soiltypes and whatnot. I was manipulating climates and atmospheric conditions such as dramatically raising the amount of N and CO2 through the use of various canisters and/or chemical reactions that may or may not have involved burning methane in order to simultaneously balance the temperature ideal for set vegetatation. I know all about the low hanging mist and its lethality. For it to actually reach such high concentrations and effectively push the O2 up above 1 meter and a half above the ground in open air, you'd need three things. 1. An absolute shit ton of CO2 2. Complete lack of wind, no rain but pretty high humidity 3. A valley that is basically a bowl It is quite clear that such conditions could only be met in tropical climates and very specific geographic conditions. hence, very rare events. Except then maybe for those who are experimental basementdwellers and/or like to spent their time in poorly airated subterrainian constructions like septic tanks, rainwatertanks, abandoned coalmines and postapocalyptic subwaysystems. You might just happen to stumble upon a methane or CO2-bubble.

[@mariawhite7337]

Ah yes. Non disclosed vegetation. My favorite. How your aunt Mary Jane BTW?

[@Roguescienceguy]

@@mariawhite7337 she died a few years ago unfortunately. She was a wise woman who learned me many valuable life lessons

[@macktheripper7454]

@@Roguescienceguy I also miss her and think of her often

[@butchs.4239]

CO2 pockets are one of the things they warn people about in an effort to keep them from exploring old gold mine shafts in Colorado.

[@seraphina985]

@@butchs.4239 CO2 isn't the only nasty gas that can find it's way through cracks in rocks and make unventilated caverns hazardous to ones health either. Not really the sort of spaces you want to be blundering into without a decent air quality monitor at a minimum and knowing how to use it properly.

[@shepshep8654]

I was bad at high school chemistry. I studied hard and spent extra time trying to understand the subject. The teacher just gave me a passing grade even though I faild so I didnt have to repeat the course. Mr. Chang said to me "You need to avoid taking chemistry in college." Thanks for the advice.

[@sherrykathman3309]

I had exactly the same experience. I hate chemistry.

[@sophierobinson2738]

The math killed me in chemistry. I never learned how to use a slide rule. Yes, I’m that old.

[@Billiousful]

I remember seeing a documentary about the Lake Monoun tragedy many years ago. The marks on the bodies were found to be compression sores. It is believed the people lay unconscious for some time before they eventually died, this allowed time for the sores to develop on the motionless bodies. These were the findings at the time, so new evidence may have arisen since then .

[@pencilpenproductions3257]

Gosh I love watching your videos. I'm at the edge of my seat in the beginning of the video and every time I think "oh wow what a big tragedy" then you pull out the "It happened again but bigger" I'm blown away every time

[@TrueMechTech]

1:17 pov you just defeated the ender dragon

[@tahyang]

*lol*

[@tanukiloaf]

lmao

[@Leonardo-hy1fo]

Wait, it does actually sound like that lol

[@WoodDRebel]

as a mid 30 year old its amazing how much Joe is able to find we simply had no idea was out there. freaking love this channel and always look forward to mondays

[@Alfadrottning86]

Just one thing .. Sigurð is certainly not the most Icelandic name. It is VERY uncommon here. (so Sigurðson is equally uncommon) .. it is much more common in Scandinavia

[@JurisKankalis]

Of course there must be a girl called Ragna commenting on what is not the most Icelandic name. Greetings from Latvia. I speak fluent Norwegian, some Swedish and understand Danish - but when you guys start babbling in your version of viking-speak (sorry) - that's a whole different universe. Beautiful language, though - as is your country.

[@johndododoe1411]

I'm guessing it's the presence of the letter Đ that makes it stereotypical, not the father being Sigurd.

[@elizabethpemberton8445]

Complete, ridiculous tangent - my Minnesota Lutheran church choir was singing an Icelandic hymn to celebrate the 1000th year of Christianity in Iceland (.....yeah) and our native Icelander said we had kind of a Swedish accent to our Icelandic. I figured that was better than an American accent, at least.

[@friskylime]

I've had a can of soda explode on me before. It wasn't shook up or anything as far as I know, just opened it and the entire contents of the can instantly emptied out in a split second. It didn't hurt me or anything, but it scared the hell out of me.

[@macklinillustration]

Reminds me of soda roulette, where you randomly chose a unopened carbonated drink, shake the shit out of it then place it back with its unshook brethren, walk away & wait.

[@thebigmacd]

A coworker of mine once opened a bottle of pop and had raised it to his mouth before it spontaneously exploded all over him.

[@FirstnameLastname-jd4uq]

@@macklinillustrationthe explosivity would probably only last like 5 minutes before all the bubbles you made by shaking would pop

[@momcat2223]

"...inside where it's not so hot and . . . sticky." Dude. I could hear the deadbolt on that patio door slamming into place from here. Thanks for the throwback dance beat, too. You always make me giggle, even if you DO go on to scare the pants off me by recounting one more way this planet is out to get us.

[@willmfrank]

"Mother Nature is Trying to Kill You" -- Dan Riskin

[@AnimeShinigami13]

I love the start. XD I was like "oh my god he's gonna get soaked JUST ONE JOE JUST ONE!" Love the use of "under pressure" and I LOVE that you are covering this!!! The locals actually have a mythical beast that was inspired by this. I forget the name of it though.

[@RolandHazoto]

This song got Under Pressure stuck in my head, and I forgot The Magicians version makes me cry every time. Thanks Joe Scott, now I started my day crying!

[@Falcodrin]

One of the best they did

[@Theinfamouskiki411]

Right! Love the magicians

[@euansmith3699]

That was great, and reminded my the tear-jerking nature of the "Power of Love" cover from the TV series Misfits (the video on KZbin is NSFW as it contains audio from a parallel scene from the episode).

[@jackielinde7568]

I have that table. The 4 foot Lifetime table. Got it at Costco. Don't remember what I paid for it. But it's nice that I can throw it into the back seat of my Jetta and pile the rest of my dungeon master stuff on top of it when I'm headed out to play Dungeons & Dragons. It's a nice buy, and I definitely recommend it over the six foot model that folds in the center.

[@tylerleblanc520]

Joe can I just say how much I appreciate your Channel... I love all your videos, but this time I was on the verge of a panic attack because of stuff I don't really want to get into right now... your dry humor made me laugh and actually feel better. Thank you

[@sammyg6446]

What a comforting video my daughter and her family are currently living in Rwanda on Lake Kivu. They had to evacuate for the volcano last year.

[@jefferyrightmire9520]

I truly appreciate your hubris and candor. I enjoy the dry humor in a way reminiscent of a couple of college professors in life past. Thanks.

[@seal8900]

Imagine being one of the investigators. Something that unexplainable no burns, no evidence of harm, nothing but death. That’s horrifying.

[@MisoElEven]

Doesnt sound as bad today really..but imagine that 1000+ years ago :D

[@manuelredgrave8348]

@@MisoElEven Modern Times : Eh, prolly just gas lol Ancient times: THE END DAYS ARE COMING, WE NEED HUMAN SACRIFICES

[@RisingRevengeance]

Somehow the lack of flies and other bugs is the creepiest part for me. Just bodies everywhere and quiet.

[@lubue5795]

"I looked, and there before me was a pale horse! Its rider was named Death"

[@euansmith3699]

As an investigator, I would want a full NBC suit, just in case, what ever killed all those people happened again before we could find out what it was.

[@LTMarhman]

Sound of water crying 🤣. I might use this. I thoroughly enjoy all your vids but really liked this one.

[@kariannefimland1475]

this had me laughing as well. 🤣🤣🤣

[@frantikfueled]

Definitely goes to phrases I’m gonna use 😄

[@quentinbell5617]

My son asked me what would be the most optimum amount of gravity for a planet to have to enable a human to run the fastest possible speed. I told my son that we would have to ask Joe Scott.

[@LoneStarr1979]

... or maybe the Manleyest of all Scotts ;-)

[@digitalnomad9985]

It would depend on HOW FAR the run was. Higher gravity would give you better traction and leverage for acceleration from a start. But under 1G, fatigue tends to be an ever increasing factor as the length of the run increases, thus the faster runs would occur in lower acceleration environments. Also, you would encounter diminishing beyond a certain point with both high G sprints and low G marathons. You can't run if you can't stand up, and you can't run if your feet don't stay close enough to the ground.

[@ac1dflare937]

The gravity is not the issue it's Air density. A cyclist uses 90% of energy just to get the air out of the way. So optimum would be slightly lower G, but only slightly as lower G, lower grip and subject to the (Moon Bunny hop). Increased O2 breather as that's your fuel. More O2 humans get like a car a turbo boost (too much you die) and in a vacuum tube. And for preference down a slope. Man In UK ran down hill faster than Usain bolt and he was no sprinter. This is why you are unlikely to see this at the olympics

[@elkikex]

Pretty cool question. I think the most important aspect is the effect of "G" on atmospheric pressure because it can, both increase/decrease resistance and therefore acceleration, and also affect the runner's oxygenation. So my bet is, as low a "G" as air pressure can keep you conscious, but more than running, it would be like pool bottom skimming at super speed.

[@quentinbell5617]

@@ac1dflare937 one time my grandma ran downhill on her face, faster than Usain Bolt ran the world record track sprint on his feet.

[@daisyjane5321]

When I was 12 there was too much rain and it flooded in my area and cows floated across the freeway towards the ocean it was wild

[@troliskimosko]

One of the most facinating videos you've posted all year! Thank you for the consistent content Mr. Scott

[@AverytheCubanAmerican]

Well this hits home and this whole mentos geyser was my fifth grade science fair project when I was in Jersey City. I got different brands of sodas both diet and regular and determined which one went up the highest. Whichever two people had the best projects in the whole fifth grade determined by the principal and vice principal would represent the school at the city’s science fair. I actually made it to the round of being judged by the principal, I was one of two selected for my home room, as everyone else in my class was just comparing toilet paper.

[@greenday38]

Please don't leave us hanging - which brand went up the highest???

[@kushina382]

I want to know too

[@drippingwax]

@@greenday38 This does a good job of explaining why Diet Coke reacts so much: mythbusters file # 4: explanation of the diet coke - mentos

[@drippingwax]

DIY Science tried 9 types of pop in: Soda and Mentos Experiment

[@drippingwax]

Olivia Rose tried 8 types in: Mentos and Soda experiment She didn't include the research that DIY Science did, but she had a better camera angle. The girl on DIY Science kept her face off-camera, so you couldn't see much of the reaction.

[@simonhaddow5052]

I heard of a local Dam 'Rolling Over' and causing a fish kill a month ago. Was described as the bottom water coming to the top and the top going to the bottom. It was after a cold snap in winter with winds. Perhaps the top layer got cold and more dense so it went down. In a volcanic region the bottom layer could get warmer and less dense so move up.

[@cherylm2C6671]

turnover, and perhaps also sulfide

[@topherMac]

This is probably your best written and plotted video I’ve seen yet. Great job to whoever had their hands on it. It built like a good movie.

[@aodigital9421]

Filming like a movie doesn't equal best writing and plot line.

[@topherMac]

@@aodigital9421 I didn’t say anything about filming like a movie… I said it built like a movie. I was referring to how he built his ideas up one on top of the other like a really good film does. It was an exceptionally well written and plotted video. I usually really like his stuff, but this was an exceptional video I feel.

[@ardonjr]

@@topherMac Don't bother.. there is always that one person that needs to be negative on a comment. ;)

[@electricwheelchair]

13:10 That's a very weird counter. The seconds are divided in 35 units which count up while the seconds count down. 😕

[@JeepnHeel]

It makes me sad to think that there are generations that will hear music in this video and wonder how ice contributed to the reaction

[@nathangoddard8115]

“So bad for you” Has another sip. I’m there with you Joe. The hot dogs I’m grilling are terrible too.

[@huyked]

Gah! Now I want some hot dogs.

[@notablynova]

I raise my gas station cheeseburger in a toast to you good sir 😂

[@vedangsinghal3038]

Good to see limnetic eruptions getting attention. Lake Nyos has always fascinated me.

[@autohmae]

For me it's just a reminder that climate change will cause a lot of issues, maybe not limnetic eruptions, but still other issues we didn't expect.

[@dl2725]

Wild coincidence: I learned about this disaster earlier today when I read about it in an article about R&D into sequestering liquid carbon in sandstone under the Gulf of Mexico… and how you need to make sure it doesn’t leak and belch itself up because it could smother 1700 people at once.

[@therealbadbob2201]

They found lakes of methane at the bottom of the Gulf. Methane is in a liquid state down there because of the pressure.

[@lostgarbage4055]

That feeling when you live near a "sea" with this exact problem that, if releases carbon, can chocke half Europe.

[@GamerGod-fp1tj]

wha

[@hmr1122]

If you mean the Adriatic, with the sheer size of an event that could upturn that volume of water, it would be the least of your worries.

[@a.karley4672]

@@hmr1122 I'm not quite sure what he means. But there are a number of volcanic lakes around Rome (did you know that Rome is largely built on a volcano? No? Odd that the Rome Tourist Board don't mention it more - it would increase the amount of geology tourism) which have been assessed in regard of this hazard. They're not a problem, at the moment, but every so often they send a grad student out with a boat and a deep-water sampling rig to check the deep CO2 levels.

[@CANEHURRICANE]

Such a badass opening the can of soda at the end

[@downunderveggiegardendiaries]

Heard that if you put Mento’s in Coke as a teenager it does something interesting. I thought it would be a taste thing. I put 3 in a big bottle of coke and screwed the lid back on and it blew the lid off like a rocket and hit the shed ceiling way above us and rained down coke all over us at My Friends Birthday Party setup lol. Luckily it was in the shed with a dirt floor.

[@ndnddndndnnodemnnnddndndn]

🧢

[@downunderveggiegardendiaries]

@@ndnddndndnnodemnnnddndndn go try it instead of living your life in your head. Give the bottle a good shake first because you are hard to impress lol.

[@ndnddndndnnodemnnnddndndn]

@@downunderveggiegardendiaries el toxico for el emojion

[@jacksonburger2081]

Gotta be honest, I really liked your intro. Doing science project type things that relate to the topic but aren't direct is awesome. Reminds me of Vsause's intros and I love it!!

[@herblee4180]

Really enjoyed this. Excellent mix of enterainment and education. "Gee Mr. Science"

[@s.vidhyardhsingh3881]

4:05 That sounds an awful lot like the depiction of the death angel of Moses’ tenth plague from the Bible. Except it only killed the firstborn son of the Egyptians, and stayed away from the Israelites who followed the Passover meal that night.

[@DavidsD00MedReport]

Thanks!

[@PiaMalmberg86]

As a person who is studying to become a science high-school teacher, this is such a great video :D Thank you for doing this and keep it up :) Love your videos Joe :)

[@sheldonpon9141]

I spent some time in Cameroon in an area close to those two lakes (especially close to Monoun) and I vaguely remember them talking about a lake that exploded! Neat to see a video about it.

[@axem.8338]

Do a video about methane trapped in lakes and people lighting them. Also permafrost melting exposing fossils.

[@Alexander_Sannikov]

wait what's that song? at 2:50 and a bunch more times. UPD: it's Under Pressure (by Queen). Or it's Vanilla Ice - Ice Ice Baby, which "borrowed" this line from it and accidentally became a hit.

[@Zippythewondersquirrel]

Fun thing. I made a playlist that was all versions of Under Pressure then put in Ice Ice Baby. I named it Russian Roulette.

[@tsbrownie]

If I recall, the one lake over-turn in Africa was caused by a slide on the narrow end which displaced enough deep water to trigger the release.

[@tomasvensbergas826]

Nice video. really enjoyed it. for those who wonder how deep the lakes where. Lake Monoun 99 meters. Lake Nyos average 94 meters max 208 meters. Lake Kivu average 240 meters max 480 meters. and those lakes are high in elevation witch i think plays big role as well 1000+ meters.

[@mossblomma]

I love these kinds of videos, interesting history/distasters and the science behind it makes for a great combination.

[@aidenmclaughlin1076]

Horrible tragedies? What a great way to start the morning!

[@jon420]

We experienced that almost daily since 2016

[@aidenmclaughlin1076]

@@jon420 Too true

[@cycleinthesun]

My colleague from Cameroon told me about Lake Nyos and it was so interesting to learn about. This is the second "podcast" that Lake Nyos has turned up on in the space of a week. The other being Unexplained Mysteries on Spotify.

[@kobeathris4552]

Could they install artificial fountains in Lake Kivu, and put turbines in them to generate electricity? If so, would the release of CO2 from venting a lake be worse than from a fossil fuel power plant?

[@aaronhpa]

May be hard to install them without explotions

[@nikiTricoteuse]

Oh wow. I've seen those fountains in videos of American (Canadian?) lakes and wondered why they had them. Makes sense now.

[@allangibson8494]

Lake Nyos had a CO2 vent installed in 1990. Not actually too hard to do. Lake Kivu’s methane content means rather than a suffocating cloud, that will be closer to a fusion bomb scale fuel air explosion… (3160 Mt yield (or 120 times the yield of the Tsar Bomba)). If full conversion occurred that would break windows in Europe and Africa wouldn’t have a population in central Africa any more.

[@ckl9390]

Perhaps after scaling up the methane extraction to the point that they effectively run out of methane in the lake. Then having previously made the fountain assemblies with new or or repurposed turbines from the methane-steam generators, implement them at a rate deemed unlikely to trigger a mass CO2 release. The power grid would still need power and the lake would have a second reserve of potential to tap into. They don't even need to burn all the methane first, just extract and bottle it for later use or export it. You then have to worry about the GHG impact, if the amount of CO2 is sequestered in the lake is comparable to a significant fraction of global annual emissions. Compressing and liquefying it would take about as much or more energy than is gotten out of its extraction, so that is a non-starter. Perhaps channelling it into greenhouses locally, or as far away as pipelines of low pressure gas can accommodate. I've heard of concentrated atmospheric CO2 being used to multiply greenhouse yields. The most problematic issue being the health and safety of the workers, but that is solved by using low level breathing masks that provide canned breathable air in a constant stream over one's mouth and nose, with excess and waste being vented off to the side. Locally, outside the greenhouses, there could still be an asphyxiation hazard, but that is remedied by an exclusion zone (within which all personnel must wear the aforementioned breathing apparatus) to a radius where any excess CO2 that escapes the greenhouses suitably dissipates. There being two jurisdictions on that lake actually is a benefit as both can do this in concert or individually if the other is incapable or won't.

[@RockinRoland72]

I love your videos Joe! I really appreciate your talent and I love learning new facts. Love your sense of humour as well. I feel like you may have missed a golden opportunity in this video to include toots and the Maytals pressure drop.

[@keenansutherland2776]

Yo Joe, this is an eye-opening video. Super cool science we experience every day and a fantastic exercise in acknowledging the scale of the world around us. I wish I had this video to watch in high school for that very reason. Super great stuff, thank you much!

[@dr.OgataSerizawa]

As a kid in the early 60s, we’d put lifesaver wint-o-green candy in a bottle of Pepsi. It unknowingly, set the chemistry hook. Now, at 70, it turns out that it worked like a charm…..what a long, strange trip it’s been😵‍💫😏😉 Btw, great upload, Joe. Love ALL of your stuff!

[@miroslavhoudek7085]

I don't mean to be insensitive ... but as long as they are not planning to prevent the disaster, can they at least point some 8k cameras on the lake, so the rest of us can see the lake overturn, with the waves in hundreds of meters and all that? Maybe with autoupload to some subredit, so I don't have to wait for the deadly cloud to disperse so someone can upload it manually? Thanks.

[@kerryarrant1523]

Always, I learn something new often so very strange, which is really how I view your channel. You rock, thank you very much.

[@RomanDavidDeSilva]

Do you know what I love so much about your channel? You're the only person that can make me afraid of living next to a lake. I wanna thank you for ruining my dream of owning a house by a lakeside.😭 You've educated me on so many things that I'm pretty much paranoid about EVERYTHING. Love your channel 😁😁 I'll be in a corner curled up in a fetal position looking forward to your next episode.

[@nicks6657]

0:01 why was someone knocking on my door!

[@macgeek2004]

Um, this is a good question! Did we never get this answered???

[@jackmidwood1697]

Scared the shit outa me

[@jakesanchard461]

Was looking up these two lakes on Google maps and found that Lake Kivu is about 2,000 km EAST of Lake Monoun, not West. Sorry to point that out!

[@animarthur5297]

3:03 Wait... so opening a soda can releases CO2 into the atmosphere? Does soda contribute towards climate change?

[@cozymonk]

3:16 So, if you just dropped a couple rough stones in diet coke, would it react like that? Why don't mentos have such a violent reaction with regular coke or any other non-diet drink? I don't think that's the right explanation. There's definitely more to it.

[@pantheis]

The surface of Mentos is microscopically rough, allowing for many bubble nucleation sites to form all across the surface, leading to a massive and quick release of the CO² from solution. Any sufficiently rough surface with small enough feature size should cause the same reaction. That's the explanation that I've seen given for the cause of the reaction. It isn't a chemical reaction, but a physical one.

[@jfjjgbggkhv]

@@pantheis Achually there is a chemical equlibrium as well. The amount of CO2 able to be dissolved in a water solution isn't only dependent of pressure, but two acid-base equlibriums as well. Once the CO2 have been dissolved into H2CO3 there is also H2CO3 + H2O HCO3- + H3O+ and HCO3- + H2O CO3 2- + H3O+ , These two are dependent on the acidity of solution (And they will also influence the acidity) and a basic solution will be able to absorb more CO2 than a acidic one. This will also have the consequence that if you have a basic solution with lots of CO2 dissolved, suddenly lowering the pH can induce bubble formation. So if there is a chemical part into why bubbles are formed easier in diet coke, it could be that diet coke might not be as well pH-buffered as other sodas and the mentos lowers pH. Another explanation might be that the composition of diet coke means that if bubbles are formed more easily and thus you will have a more violent reaction.

[@fredericapanon207]

@@jfjjgbggkhv most soda pops are quite acidic. There usually a fair amount of some kind of acid added, whether phosphoric or another. That is why drinking a lot is so bad for your teeth and your bones. The calcium in your teeth gets eroded, and the calcium in bones gets used by the body to balance the acidity.

[@jfjjgbggkhv]

@@fredericapanon207 I'm aware of that. All formulations are trade secrets but the Phosphoric acid is most likely used as a buffer, since it has three protons. That sodas are bad for teeth are not strange since below a certain pH the tooth enamel breaks down, even though eating often is probably worse since the bacteria in your mouth will break down the carbohydrates in your food into acids. (Fun fact, Hunter-gatherers usually have better teeth since they eat less carbohydrate rich foods). Wheter it's bad for you bones or not, I'm not so sure, I have yet to see any credible sources that have linked soda drinking to osteoprorsis. (The body have a number of systems to manage the pH inside the body and if your acidity would change enough to dissolve your bones by drinking soda, you would be dead from other causes before that)

[@nikiTricoteuse]

Thanks for the comment, I was wondering the same thing and you've started another interesting thread.

[@a24396]

What a fascinating topic! Thanks so much for sharing it!

[@andydbedford]

Oh my god, and I thought Las palma with 1trillion cubic tones of earth that could slight into the Atlantic ocean at any moment or in 100 years was terrifying... Which it is. Absolutely brilliantly presented, this is my first video I have seen a video from your channel, so ive just subscribed and get my daughter to watch them, she is really really in to Chemistry, whilst my other daughter really loves physics. great job, loved this ❤👍.

[@Shinzon23]

Existential dread is fun, ain't it

[@Dave5843-d9m]

LaPalma may well slide into the sea. But the inevitable tsunami will not be a fraction of what the pop scientists claim. The hill is simply not big enough.

[@pollydoom5039]

I’m really glad you showed yourself cleaning up with the hose. Cuz my first thought when you started was “you better clean that up before you get bugs and everything gets sticky.”

[@Zippythewondersquirrel]

Diet Coke so not really a problem except for the small amount of sugar in the mentos.

[@satanic_rosa]

7:15 Mr. President, a second event has occurred.

[@toobcat24]

Underrated comment

[@BHuang92]

I've heard of the Nyos incident as the deadliest lake in history!

[@GPGPapercraftTX]

Ok Joe, you have reached the height of your talent. You can just walk into frame with a table in your hand and make people laugh. You go boy!

[@SupremeLeaderKimJong-un]

People should really be worried about the next time our Mount Paektu erupts. It’s an active stratovolcano along our Chinese border and it caused one of the most powerful eruptions in recorded history back in 946 (with a VEI of 7; higher than Krakatoa’s 1883 eruption which had a 6), so much that the ash made it to Japan’s Hokkaido.

[@tech5298]

Kim, Great Leader, have a snickers bar.

[@PutsOnSneakers]

I love the UNDER PRESSURE from Queen song in the background nice touch!

[@therealbadbob2201]

As a young teenager I lived close by Norad. For fun I built a multi-engined, multi staged rocket which I packed with aluminum foil strips. I glued the last stage together so it would blow apart. The entire reason for this was so I could make a small blip on the airports radar. Norad sent out several vehicles to investigate so I guess this was a confirmation. Junior High science teacher mentioned this project in passing. He was correct, it worked.

[@peterfenwick2540]

I have no idea why but your attempt of the Mentos in Coke seems to be the most honest version ever, You have completely eradicated my lingering desire to try this myself. Great video, thanks, Joe.

[@chitlitlah]

I found out at work that dropping those Gatorade flavor tablets into carbonated water will also cause an eruption. The small amount of water that remains in the bottle does taste pretty good though.

[@CainCalifornia]

Pressure Pushing down on me Pushing down on you, no man ask for Under pressure That burns a building down Splits a family in two Puts people on streets Um-ba-ba-beh Um-ba-ba-beh Dee-day-da E-day-da, that's okay It's the terror of knowing what this world is about Watching some good friends screaming "Let me out" Tomorrow, gets me higher Pressure on people People on streets Dey-dey-dey-mm-hm Da-da-da-ba-ba Okay Chipping around, kick my brains 'round the floor These are the days, it never rains, but it pours Ee-do-ba-be Ee-da-ba-ba-ba Um-bo-bo Be-lap People on streets Ee-da-de-da-de People on streets Ee-da-de-da-de-da-de-da It's the terror of knowing what this world is about Watching some good friends screaming "Let me out" Tomorrow, gets me higher, higher Pressure on people People on streets Turned away from it all like a blind man Sat on a fence, but it don't work Keep coming up with love, but it's so slashed and torn Why? Why? Why? Love (love, love, love, love) Insanity laughs, under pressure we're breaking Can't we give ourselves one more chance? Why can't we give love that one more chance? Why can't we give love, give love, give love? Give love, give love, give love, give love? 'Cause love's such an old fashioned word And love dares you to Care for the people on the Edge of the night (people on streets) And love dares you To change our way of Caring about ourselves This is our last dance This is our last dance This is ourselves Under pressure Under pressure Pressure

[@hannahkirk1516]

Never actually bothered to look up the lyrics to this song in the whole 23 years I’ve been alive. I don’t know why I was surprised at how poetic they really are but I am

[@CainCalifornia]

@@hannahkirk1516 I love Queen I am glad you have a new found appreciation of the song 🙏

[@Zippythewondersquirrel]

It’s a sad but good song.

[@sidvane1]

This is a departure from your usual vids, I appreciate the tangent! I am a fan, thank you for what you do, love your work, comments, observations, and your jokes, well done!! I think you have great comedic timing!

[@nickitoff9629]

Joe delivers a great message with science and humor. Thank you for doing your experiment, it was awesome!

[@themodernfrontiersmen]

I remember doing the Coke and Mentos thing as a kid, expecting a huge explosion, only to find out I had the wrong kind of COke lol

[@euansmith3699]

I tried that, too; but ended up in the Emergency Room with Mentos stuck up my nose. Disappointing!

[@buttonsjr]

Hey Joe this was your best video in a while, I like all your videos, but dang I have never heard of these events and how devastating they are and can be. Hopefully this video picks up good with the algorithm. It's very fascinating.

[@Tropicaya]

@1:23 Yup! Me in the bedroooom. Awriiiiiite

[@gullybonesart4670]

I hope you think about this comment

[@wcookiv]

Then stop eating dairy before bed, damn.

[@kikolektrique1737]

The fact that even the insects have died is both a relieving yet terrifying thought. Cause the thought of a place so dangerous where insects which are known to be found practically anywhere on land, can die along with everything else. makes you shudder

[@michaelquigley1411]

Hey Joe, I just found your channel and I've really been enjoying it. "Knowledge Is Good" said Dean Wermer's desk plaque ad I subscribe to this idea. So thanks for all the hard work and also for the great comic relief.

[@innconspicuous]

-That's the sound of water crying- 😂👍🏻🍿

[@Getpojke]

I've been lucky enough to swim in a naturally carbonated pool fed by a hot spring atop the calcium basins at Pamukkale in Turkey. It makes you very buoyant so we were having competitions with the locals to see who could swim to the bottom & collect rocks. As the site was an old Roman bath house there are still fallen columns in the water. You had to be careful if swimming with your nose just out of the water on still days though, there is a layer of denser CO² floating just above the surface. Lovely though, like swimming in bath hot Perrier.🏊

[@paulhaynes8045]

A proper length video at last! Bit concerned about the 'chemistry' though. It appears to show water and oxygen combining (to form a new molecule?), but the CO2 just disolves into the water - there is no chemical reaction. The sudden release of energy is not a chemical reaction, but a purely physical one - very rapid un-disolving because of sudden release of pressure.

[@Maxamar90]

Interesting vid Joe! I love seeing how much your channel has grown.

[@vprice84]

I just imagine you in the grocery store buying that stuff. I wonder if people recognise you as a guy making a video that millions of people will watch or if they just thought you were showing your kids something.

[@naturalistmind]

Seeing you say that soda is so bad for you while taking another drink of your soda reminds me of how nurses and doctors become pick up smoking because of how stressful their jobs are.