Try Nick Zentner, Central Washington University. You will find out all kinds of fascinating things on northwestern US geology, some of the newer research is quite fascinating, like the northwestern portion of Oregon and the Olympic peninsula rotating clockwise 10 cm a year with the center or rotation near Pendleton OR.
Quite possibly the best episode you guys have put together, both over here and at Eons. Not that I expected anything less from my two favorite TH-cam channels in existence. Keep it up! Your teams are amazing.
It’s really cool that you guys included a mention of the younger dryas comet hypothesis. It would be cool to see a video about it in the future with more information, but still cool to see you guys including all perspectives. Thats good science!
@@simbits6660 that guys right, they didnt. the people in this video think an ice dam held back 600 cubic mikes of water which makes zero sense and is completely impossible
there was a pretty major flood i learned about when i visited the museum of London. i cant remember if it was 10,000 y/a or 100,000 y/a, but there was a huge prolonged flood which actually moved the river Thames. it used to flow northeast, and you can still see that in the first 1/5 of the river today. it would meet the north sea somewhere up near Hull. when the huge flood came, the erosion and sheer mass of water pushed the river over the ridge, and the river started flowing east through London like it does today. i learned this about three years ago, so i may have misremembered some things. if you live in London, I urge you to visit the museum, it's super interesting
love that you guys conscientiously only talk in the metric system. welcome to the global community... please keep up the good work to bring the rest of america with you
Remember when NASA crashed a rocket on mars and when they checked what went wrong with the math, turns out they forgot to convert to metric. (true story) Having a different and less elegantly simple system causes problems.
@@allangibson2408 disagree. Have you watched his whole lectures on his Geocosmicrex channel? It is basing his whole theory from the whole continental landscape. Inclusive of phenomena we see today in the geological landscape, as well as the analysis of fauna around at the time.
@@allangibson2408 the trajectory of the Carolina bays, and they arent just in Carolina, if you type in google "Carolina Bays Trajectory" you will see where they all originated...
What’s awesome is that when the French explorers settled in the st Lawrence valley and expanded into the Great Lakes, they met with native storytellers that spoke of a vast inland sea around where Lake Agassiz is considered to have existed. When we know that native tribes migrated from west to east over 15,000 years, they simple recalled how their ancestors saw the world as it was. Lake Agassiz actually shows up on early French maps of North America as described by natives. This fed into the lore that there was a vast sea that opened up to the pacific. It was later proven false, but there are still some later maps that reproduce a vast inland sea called “la mer de l’ouest” basically reprising the existence of this fabled inland sea.
interesting!! i stumbled on this looking for ancient floods that tie into the biblical noahs flood around 4500 years ago if you believe the story. since these are word of mouth stories possibility exists it was longer ago than that
There was also a asteroid impact at the start of the Younger Dryas, perhaps BOTH had an effect. So sad no one ever talks about the Older Dryas, lol, yes there was a Older Dryas.
Great episode with good science and clear explanations. Coincides nicely with recent research about the impact of the younger Dryas on early Natufian culture in the Levant.
"The great world flood" is a true thing for sure, it's just not one big flood. It's a series of countless floods over thousands of years that hit basically everywhere in the world at some point or another. That is why basically every culture has this "great flood" myth, and some exaggerate it to covering even the highest mountain tops.
According to sea floor and ice cores we are in an interglacial warming period. It’s based on the earths tilt and wobble around the sun. (Obliquity, Eccentricity, and precession). This warming period will last a few thousand more years and began at about the time these floods occurred. In the short term, solar cycle 25 looks to be the weakest on record and may indicate the onset of a solar minimum. The northern hemisphere will start to have longer and colder winters and the climate will be cooler and more volatile as the suns output decreases.
Seems more likely that the great flood stories all come from a single flood in the middle east and that story was then transported around the world as humans went on walkabout.
Why not both theories? The impact theory has evidence now with the greenland crater. And the impact might have disrupted the lake and caused it to flood along with vaporizing much of the glaciers around the crater and making it rain around the world for days.
I was wondering while watching if the Hiawatha impact would be mentioned. The dates I find on the Saginaw impact range from 800k years to millions, none I can find is close to the the 13k. It is true that none of the articles about Hiawatha do more than suggest it *may* have happened about 13k years ago. The very little research I've done says that even the original researchers said more study, specifically as to dating, and the nature of the 'black mats' found at sites near the Clovis extinction needs to be done. This is not something I know much about, but I like the idea that not one big impact, but perhaps several smaller ones, combined to cause localized die-offs within hundreds of years of each other. The over-all effect of the impacts causing the fresh-water interruption of the currents would then cumulatively put the "nail in the coffins" of some of these mega-fauna species and the Clovis culture, already affected by their local ecological changes, while allowing other species to survive.
My understanding is that there have been 2 different craters found in Greenland. But both are such new discoveries that we are relegated to speculating about their age... at least until more work is done.
actually no the asteroid impact is supected to have casued a cooling of the climate for about a thousand years then weather warmed up again it is most likely that the flood occrued right after the mini ice age was over
Don't forget the one that created the English Channel. Originally England and France were joined by a giant land bridge of chalk hills stretching between Dover and Le Cap Blanc Nes which held back a huge lake that possibly stretch as far north as the northern coast of East Anglia all the way across to the northern coast of the Netherlands. Eventually it broke through in 2 separate Megaflood events and gouged out the initial channel. 10,000 years of tidal erosion later, and we have the English channel of today. :)
@Ryukai-san - Those three tsunamis were caused by huge submarine landslides from Norway's continental shelf. They are called the Storegga Slides and were the result of glacial moraines left by the last Ice Age. They erased Doggerland, the connecting low-lying area between England and now-mainland Europe, taking untold numbers of fauna with it, including human settlements..
@@acousticpsychosis Carson suggests there was just one Missoula flood due to a giant comet impact and there is zero percent chance he is correct. There are over 40 rhythmites in the Wenatchee valley that are easily dated and even have volcanic ash between some of them. It's very clear ice dams were breaking about every 60 years. Carlson knows this I am sure, but it doesn't play into his woo so you won't ever hear him talk about it: th-cam.com/video/TgevbfaQLBE/w-d-xo.html
Great video ❤️ I am so interested in the flora and fauna around Ancient Lake Bonneville and the massive flood, referred to as the Bonneville Flood, that took place when it burst its banks. I cannot find anything on it and it’s been making me crazy for about 30 years now!
@@MossyMozart wow this is crazy! I have been trying to get to the natural history museum for years! Ok wanna hear what has happened in the last 4 years? I fell in my driveway, broke my neck, became quadriplegic and have been working my butt out of my wheelchair every since! I went for a 1/4 mile “hike” this week to look at the changing leaves, it made me feel incredibly powerful 😇
I literally just read Kim Stanley Robinson's Mars trilogy again and their is an absolutely excellent description of the badlands floods as they might have happened, absolutely epic.
I totally wasn't sure which video to watch first, so I just took a guess. Turned out I was right. I'm going to guess Hank is in the Eons video. My second guess was clearly wrong.
Hey SciShow - this is an older episode, but I did want to point out what I believe is an error @2:34. The water moving north in the Atlantic loses most of its freshwater to evaporation, not to the formation of sea ice. Evaporation and cooling as the water moves north are causing an increase in the water's density. Down-welling in Antarctica is chiefly characterized by the formation of sea ice. I wouldn't know any of this if I wasn't currently being forced to understand the extreme complexities of the AMOC for my grad program lol.
I grew up in the huge valley carved out by the Lake Aggasiz flood. Fort McMurray, Alberta, baby. True story, that same flood also exposed the Canadian oilsands deposits, leading to the eventual mining of them in modern times.
If you find this interesting, look into Randall Carlson's research into this topic. He details the geologic information of this flood, and has much more information pointing to the comet impact hypothesis. There is a lot of information being left out of this video, such as the Younger-Dryas impact layer of material, filled with high-energy impact evidence such as shocked quartz, carbon spherals, iridium, just to name a few. This layer covers four continents and is an abrupt end to the clovis culture. There are no clovis artifacts above this layer. The flow rates required to channel out the scab lands of washington (basalt) are crazy. It is not possible for them to have been just lake Missoula. It had to require a much larger and more sudden flow rate -- from the ice sheet experiencing a comet impact.
Good to see that the Younger Dryas is starting to get the attention it deserves; it looks like it had a far greater impact on the planet than we previously thought - especially if a comet really was involved ( which, surprisingly - as time goes by - is looking more plausible ).
YOu seem to have missed the point of this video entirely. The whole point is that the comet impact hypothesis is a simplistic way of ignoring everything else that likely contributed to the event. Such an insanely massive flood as this would make anything less than a planet killer asteroid impact look like a mere footnote in history.
Thank you for emphasizing that these floods may have been caused by meteor impacts and other causes, despite them not being the leading theories/hypotheses. Mad respect!
an ice dam being able to hold back 600 cubic miles of water is impossible. there had to have been something that made the water melt instantaneously, and the impact theory can make that happen
Nebraska used to be covered under water in certain areas. I have personally found, marine life fossils in my grandmother's driveway and there's only one way those would be located in the middle of nowhere and buried.
You say ice melting today may stop the warm current cycle. This would lead to refreezing in the northern latitudes, which would rebuild glaciers and ice caps and keep ocean levels from rising significantly. Seems like the Earth has ways of balancing herself out.
The biggest single problem with the lake missoula ice dam is an ice dam of its supposed size would not be possible. Just by looking at the Iceland ice dams you should be able to realise this. Ice dams are leaking because they are in effect a glacier. Glaciers are porous. The water will leak through and under the ice and destabilise and then the water will be released by the dam failing. Has anybody seen a modern dam and how they are constructed? They are everything an ice dam isn't. They don't leak and are anchored solidly into the bed rock. The other point I have not seen mentioned in any mainstream science paper or article is a solution to the energy descreprancy needed to melt all that ice in the short time span that it melted in. The only proposal that has any possibility of accuracy is by Randall Carlson and his ilk. No earthly origin of the energy is possible. It melted too fast. If it was just dumped into the Sahara 13000 ya it would be still melting even today. This to me needs to be answered ASAP. if it was an earthly source it needs to be identified. If a galactic origin it needs to be identified likewise so we will not be caught with our pants down and wiped out. All proposals are theory. Disprove them all until there is only one left. Then ask can this happen again?
There are pretty darn bug lakes UNDER the antarctic ice - and even with all the warming we're causing it's not likely to collapse for a while. Anyway, I think you're misunderstanding the structure here. The ice would be anchored in mountains, and the ice would be melting from the top, in the middle. So it would be a massive ice "bowl" (so more like a dam than just a wall). And it DID collapse, that's what it's all about. And after it collapsed? Well, ice melts faster in water than in air. The freshwater would start the process out in the Atlantic, the ice would keep it going for a while.
Not a good analogy at all. You can't compare glaciers in Iceland to the Laurentide ice sheet. The Laurentide was miles thick and so heavy that it deformed the earth's crust underneath. It's sheer size alone would insure that it was well anchored and it's vast expanse would have stopped it from "leaking".
There is so much content about the Missoula Lake flood and Scablands, but I k one for a fact there are tonnes of recent mega floods that have happened near my hometown. I live in Whitehorse, Yukon, Canada. One such megaflood happened about 100 miles to the east a little over 200 years ago, that is so recent that the people who lived In the region at the time, who’s descendants are still living here, have passed on stories about the sudden departure of a lake. I wish there was more videos out there on this subject. I find it a lot more fascinating mostly because there is testimonial evidence, even though it’s heresay, there is still a lot of truth supported by physical evidence. Yes it’s fascinating learning about events that happened thousands of years ago, but isn’t it equally, if not more, fascinating to explore much more recent geologic activities? I think so. Really found this video fascinating talking about the Mackenzie River and effects of a sudden mass of fresh water being introduced into the ocean and it’s potential effects that were globally significant.
I knew this for a long time, I knew that's what they model the movie The Day after Tomorrow about!! It just made so much sense! I think the History channel did something exactly like this about the Niagara falls area!!! At one time so much water came down in a rush that it knocked out a mountain between the river and the ocean to where it changed the course of the river by knocking out that mountain. Now that's a lot of water! Great video!! I think stopping that conveyor belt in the North Atlantic is the only thing that can save us from global warming. If it could start another small ice age it might just save us. It'll get hotter at the equator but it will get colder up top and as long as it gets cold enough to start bigger ice sheets and making them spread that's all we need!
@MrGksarathy - Of course not. People in the past faced just as many catastrophes as today, but without any organized way to deal with them. People who lived in grass/wooden dwellings were vulnerable to all kinds of things and therefore have legends about them. They were also vulnerable to flooding that could come out of nowhere and sweep away their dwellings, stored foods, and relatives. How would somebody living 13,000 years ago know that a flood was a global event or even just a regional or merely local one? Floods, along with fires, droughts, infestations severe weather were all disasters that peoples everywhere had to face ALL THE TIME. Most people lived on the banks of a river or the shore of an ocean. Any disruption could cause flooding. A local flash flood on the Whatever River would be just as devastating to a small village as a larger flood.
Nick at Central Washington University explains the floods and the resulting landscape much better in his videos on his channel and the older videos at CWU.
So... the reduction of AMOC can potentially oppose global warming? And the failure of AMOC might throw us a little ice age? Can we survive cold weather more easily than hot, violent weather? Always questions with answers unavailable during my life span.
5 ปีที่แล้ว +2
- "So... the reduction of AMOC can potentially oppose global warming?" No, but it may start a chain reaction that causes a temporary and destructive shift in the opposite direction until Earth re-stabilizes to the conditions of the higher energy influx.
Global warming isn't strictly global. There are some areas that are cooling as a result, but all of this is extremely local. Someone correct me. According to a paper I SERIOUSLY READ JUST 4 HOURS AGO! "Further melting of Greenland in the coming decades could contribute to further weakening of the AMOC." So part of global warming? Source: Exceptional twentieth-century slowdown in Atlantic Ocean overturning circulation
I think we need to be worried long before we see the formation of a lake surrounded by glacier, 10 times the size of lake superior, but yes, in theory, something like this could affect the Atlantic current and affect climate, but the CO2 driven warming would still be in place. The effect would be different this time, probably not 1000 years of cooling, but something else. Hard to say exactly what.
If you find this interesting, look into Randall Carlson's research into this topic. He details the geologic information of this flood, and has much more information pointing to the comet impact hypothesis. There is a lot of information being left out of this video, such as the Younger-Dryas impact layer of material, filled with high-energy impact evidence such as shocked quartz, carbon spherals, iridium, just to name a few. This layer covers four continents and is an abrupt end to the clovis culture. There are no clovis artifacts above this layer. The flow rates required to channel out the scab lands of washington (basalt) are crazy. It is not possible for them to have been just lake Missoula. It had to require a much larger and more sudden flow rate -- from the ice sheet experiencing a comet impact
You guys already know who was responsible for cracking that ice dam... that squirrel from Ice Age, looking for that damn acorn 😂🤣
Acorn stats: attack: 99999999999999999999999999999, defense: 9999999999999999999999999999999999
squirrel LOVE: 99999999999999999999999999
That's funny. 😂
Cute.
yeah man 😂😂
@@randomthings8732 koo
Yay!! Finally, a collaboration with PBS Eons!
I've been waiting Eons for this.
I see what you did there
Next time, the collab should be between Hank from SciShow and Hank from Eons. 😂
Touché on the word play
🤣😅 oh well I tried😛
@@thishandleistacken LOL true. 93
@@SquirrelASMRjust make it a Hank con with Hank as host of all the Hanks.
Eons tells me to go to Scishow
Scishow tells me to go to Eons
help i'm stuck in a loop
why not zoidberg?
@@johndowe7003 you all still have zoidberg!
It's a wonderful loop!
Try Nick Zentner, Central Washington University. You will find out all kinds of fascinating things on northwestern US geology, some of the newer research is quite fascinating, like the northwestern portion of Oregon and the Olympic peninsula rotating clockwise 10 cm a year with the center or rotation near Pendleton OR.
🆘️
Quite possibly the best episode you guys have put together, both over here and at Eons. Not that I expected anything less from my two favorite TH-cam channels in existence. Keep it up! Your teams are amazing.
"If you were in North America about 13,000 years ago" well it just so happens..
apple54345 what’s this referencing?
@@JamesTaylor-bo8cv humans reaching the area at about that time?
NativeAmericans were in The Americas 20,000 years ago. We know that shit
*I'm native American DNA results on channel*
Great grab yourself.a medal @@mexicanmuslim
Man this is a flood of information
-4 Subscribers with 1 video Water you talking about
You have a very wet sense of humor.
I was going to say the same thing! Lol
Tidings of extreme cold.
Hue hue hue
It was just a server balance change, nothing to worry about
You again😒
TierZoo
Yeah NOTHING to worry about
I see you... Everywhere
Go away
That's actually the Earth relapsing into their ice addiction
I'll take another water.
I think you've had enough.
I'LL TELL YOU WHEN I'VE HAD ENOUGH!
"Well just look at all this water you spilled!", Always making a meth of things... :)
I have ice addiction....water not meth.
In Canada everyone ice skates and those who ice skate the most make it in the NHL
Loved the collab today! You’ve gotta do that more often.
I was waiting for Pete Davidson to share his view...I mean he has absolutely nothing going on rn so
When you all first started SciShow, did you ever even dream you'd be doing a collab with PBS? Congrats, guys and gals of SciShow!
It’s really cool that you guys included a mention of the younger dryas comet hypothesis. It would be cool to see a video about it in the future with more information, but still cool to see you guys including all perspectives. Thats good science!
They didn't mention anything about the comet hypothesis though 🤣
@@BlGGESTBROTHER `Yup they did.
@@simbits6660 that guys right, they didnt. the people in this video think an ice dam held back 600 cubic mikes of water which makes zero sense and is completely impossible
@@21LAZgoo the ice dam ideas are r3tard3d.
@@Wonderboywonderings fr
there was a pretty major flood i learned about when i visited the museum of London. i cant remember if it was 10,000 y/a or 100,000 y/a, but there was a huge prolonged flood which actually moved the river Thames. it used to flow northeast, and you can still see that in the first 1/5 of the river today. it would meet the north sea somewhere up near Hull. when the huge flood came, the erosion and sheer mass of water pushed the river over the ridge, and the river started flowing east through London like it does today.
i learned this about three years ago, so i may have misremembered some things. if you live in London, I urge you to visit the museum, it's super interesting
love that you guys conscientiously only talk in the metric system. welcome to the global community... please keep up the good work to bring the rest of america with you
Remember when NASA crashed a rocket on mars and when they checked what went wrong with the math, turns out they forgot to convert to metric. (true story) Having a different and less elegantly simple system causes problems.
@@michellesheaff3779 i do remember that! they totally yeeted that whole thing :D
thank you for all of your amazing work. It's truly a treasure.
'Cause it was dryas hell, amirite?
Josh Wilson yes I have lupus after alcohol
you could say it ran AMOC
This comment is underappreciated.
(groan)
Watch Randall Carlson's numerous talks on this subject, including the scab lands, that man is brilliant
Thanks for the recommendation!
Randall Carlson bends everything to meet his narrative rather than revise his narrative to follow the evidence...
@@allangibson2408 disagree. Have you watched his whole lectures on his Geocosmicrex channel? It is basing his whole theory from the whole continental landscape. Inclusive of phenomena we see today in the geological landscape, as well as the analysis of fauna around at the time.
@@allangibson2408 what evidence is he bending exactly? Tired of hearing this claim repeated without a reason.
@@allangibson2408 the trajectory of the Carolina bays, and they arent just in Carolina, if you type in google "Carolina Bays Trajectory" you will see where they all originated...
Excellent video, fantastic to see a link up with PBS Eons.
What’s awesome is that when the French explorers settled in the st Lawrence valley and expanded into the Great Lakes, they met with native storytellers that spoke of a vast inland sea around where Lake Agassiz is considered to have existed. When we know that native tribes migrated from west to east over 15,000 years, they simple recalled how their ancestors saw the world as it was. Lake Agassiz actually shows up on early French maps of North America as described by natives. This fed into the lore that there was a vast sea that opened up to the pacific. It was later proven false, but there are still some later maps that reproduce a vast inland sea called “la mer de l’ouest” basically reprising the existence of this fabled inland sea.
interesting!! i stumbled on this looking for ancient floods that tie into the biblical noahs flood around 4500 years ago if you believe the story. since these are word of mouth stories possibility exists it was longer ago than that
@@pollystyrene99 yes wikipedia mentions this as a possibility. See the wiki for Lake Agassiz
Very cool video! And I loved how it combined with Eons. Which I watched just before this and was also super cool.
“The Earth’s climate kind of glitched.”
*TIERZOO THEME SONG INTENSIFIES*
I like the crossing of "Sci Guys!" watching both videos is quite a flood of information!
If this ever happens again and you need a boat I N-o-a-h guy. 😉
It will happen again a year later or a thousand year later ....
It cannot happen again, there are not enough Ice Caps left to cause such a massive impact on our Earth's system.
@@Keys879 Antarctica and Greenland. Lots of Ice there.
lol
Who?
you guys are working together omgggggggggggggggggg
A pantheon of "Oh mys".
yea I admit it. I totally fan girled when Blake showed up..... 🤦♂️ These channels are freaking awesome!
This was an awesome collaboration. And great video too.
Jessica he’s been on sci show before
There was also a asteroid impact at the start of the Younger Dryas, perhaps BOTH had an effect. So sad no one ever talks about the Older Dryas, lol, yes there was a Older Dryas.
yes both
I’ve heard Randall Carlson hypothesize that there was an asteroid/comet impact but has produced no evidence.
Heeey 😁 cameo by Blake! G'day. This episode was soo jam packed, I'll need to rewatch.
Great summary, good collaboration. Thanks for sharing!
Great episode with good science and clear explanations. Coincides nicely with recent research about the impact of the younger Dryas on early Natufian culture in the Levant.
3:32
I'm drowning in all this science...and I like it:-)
Shouldn’t that be “broke the *_climate”?_*
Weird to see Blake with the SciShow background
Cédrick huh?
@@thesaintlcfr wuh wu- WHAT
Yeah it looks like their camera is optimized for dark overlay
watch the quiz shows for sci show, he hosts them
Thank you for the lovely video! 😊
"The great world flood" is a true thing for sure, it's just not one big flood. It's a series of countless floods over thousands of years that hit basically everywhere in the world at some point or another. That is why basically every culture has this "great flood" myth, and some exaggerate it to covering even the highest mountain tops.
The sudden melting of the ice sheets of north america caused a global sea level rise of 400 feet, to the current sea level of today.
According to sea floor and ice cores we are in an interglacial warming period. It’s based on the earths tilt and wobble around the sun. (Obliquity, Eccentricity, and precession). This warming period will last a few thousand more years and began at about the time these floods occurred.
In the short term, solar cycle 25 looks to be the weakest on record and may indicate the onset of a solar minimum. The northern hemisphere will start to have longer and colder winters and the climate will be cooler and more volatile as the suns output decreases.
So your saying we should double down on global warming so we don't all freeze?
Seems more likely that the great flood stories all come from a single flood in the middle east and that story was then transported around the world as humans went on walkabout.
@@johneby6878 some hypothesize that a megaflood is what created the Black Sea, and perhaps that is the flood referenced in the Bible.
Good to see two of the best science sites doing a collab.
Why not both theories? The impact theory has evidence now with the greenland crater. And the impact might have disrupted the lake and caused it to flood along with vaporizing much of the glaciers around the crater and making it rain around the world for days.
Carolina bays would disagree with you.
I was wondering while watching if the Hiawatha impact would be mentioned. The dates I find on the Saginaw impact range from 800k years to millions, none I can find is close to the the 13k. It is true that none of the articles about Hiawatha do more than suggest it *may* have happened about 13k years ago.
The very little research I've done says that even the original researchers said more study, specifically as to dating, and the nature of the 'black mats' found at sites near the Clovis extinction needs to be done.
This is not something I know much about, but I like the idea that not one big impact, but perhaps several smaller ones, combined to cause localized die-offs within hundreds of years of each other. The over-all effect of the impacts causing the fresh-water interruption of the currents would then cumulatively put the "nail in the coffins" of some of these mega-fauna species and the Clovis culture, already affected by their local ecological changes, while allowing other species to survive.
My understanding is that there have been 2 different craters found in Greenland. But both are such new discoveries that we are relegated to speculating about their age... at least until more work is done.
they haven,t dated the crater with precision yet thats why
actually no the asteroid impact is supected to have casued a cooling of the climate for about a thousand years then weather warmed up again it is most likely that the flood occrued right after the mini ice age was over
came here from pbs eons, great vid, now subscribed, thanks
"Rain rain on my face
It hasn't stopped
Raining for days
My world is a flood
Slowly I become
One with the mud"
*PBS Eons is best channel on youtube* .
Don't forget the one that created the English Channel.
Originally England and France were joined by a giant land bridge of chalk hills stretching between Dover and Le Cap Blanc Nes which held back a huge lake that possibly stretch as far north as the northern coast of East Anglia all the way across to the northern coast of the Netherlands. Eventually it broke through in 2 separate Megaflood events and gouged out the initial channel.
10,000 years of tidal erosion later, and we have the English channel of today. :)
@Ryukai-san - Those three tsunamis were caused by huge submarine landslides from Norway's continental shelf. They are called the Storegga Slides and were the result of glacial moraines left by the last Ice Age. They erased Doggerland, the connecting low-lying area between England and now-mainland Europe, taking untold numbers of fauna with it, including human settlements..
Two favorite channels in one video.
It must be my birthday. 😊
*Graham Hancock has entered the chat*
*Randall Carlson has entered the chat*
they are decades ahead of the curve
@@test-mm7bv Those guys are pioneers. Their research is going to change everything.
Their work is not accepted science. They are great storytellers trying to sell books but not into doing the real hard work for publication.
@@Quixote1818 Their work, specifically Carlsons, talks about this very thing, in great detail.
@@acousticpsychosis Carson suggests there was just one Missoula flood due to a giant comet impact and there is zero percent chance he is correct. There are over 40 rhythmites in the Wenatchee valley that are easily dated and even have volcanic ash between some of them. It's very clear ice dams were breaking about every 60 years. Carlson knows this I am sure, but it doesn't play into his woo so you won't ever hear him talk about it: th-cam.com/video/TgevbfaQLBE/w-d-xo.html
Epic video! Thanks for the knowledge.
Great video ❤️ I am so interested in the flora and fauna around Ancient Lake Bonneville and the massive flood, referred to as the Bonneville Flood, that took place when it burst its banks.
I cannot find anything on it and it’s been making me crazy for about 30 years now!
@ReesieandLee - Did you ever check into the local natural history museum? Or historical society?
@@MossyMozart wow this is crazy! I have been trying to get to the natural history museum for years! Ok wanna hear what has happened in the last 4 years? I fell in my driveway, broke my neck, became quadriplegic and have been working my butt out of my wheelchair every since!
I went for a 1/4 mile “hike” this week to look at the changing leaves, it made me feel incredibly powerful 😇
Another great video! Thanks!
This channel has 5.6 million subs! 🎉🎊 SCIENCE!
I literally just read Kim Stanley Robinson's Mars trilogy again and their is an absolutely excellent description of the badlands floods as they might have happened, absolutely epic.
Randall Carlson nailed it!!!
Great content! Keep it coming.
I feel like I just learned more than I ever did in school
Thanks Blake!
This still doesn't explain Sidd the sloth
And people call Civil War the most ambitious crossover of all time. I say, PBS Eons x SciShow is the true kind in that regard!
I totally wasn't sure which video to watch first, so I just took a guess. Turned out I was right. I'm going to guess Hank is in the Eons video.
My second guess was clearly wrong.
I thought it would be hank too and was disappointed when he was no where in either video
I love PBS Eons! 😊😊♥️♥️
Vegeta! How many Cubic Kilometers are being held back by that Ice Wall?
OVER 9000!!!!!!
Hey SciShow - this is an older episode, but I did want to point out what I believe is an error @2:34. The water moving north in the Atlantic loses most of its freshwater to evaporation, not to the formation of sea ice. Evaporation and cooling as the water moves north are causing an increase in the water's density. Down-welling in Antarctica is chiefly characterized by the formation of sea ice. I wouldn't know any of this if I wasn't currently being forced to understand the extreme complexities of the AMOC for my grad program lol.
yes correct. that's hugely important actually, as it deals with where the heat goes
Eons brought me here... and Stefan has a new shirt 😳 #videowitchcraft
about time
I grew up in the huge valley carved out by the Lake Aggasiz flood. Fort McMurray, Alberta, baby.
True story, that same flood also exposed the Canadian oilsands deposits, leading to the eventual mining of them in modern times.
If you find this interesting, look into Randall Carlson's research into this topic. He details the geologic information of this flood, and has much more information pointing to the comet impact hypothesis. There is a lot of information being left out of this video, such as the Younger-Dryas impact layer of material, filled with high-energy impact evidence such as shocked quartz, carbon spherals, iridium, just to name a few. This layer covers four continents and is an abrupt end to the clovis culture. There are no clovis artifacts above this layer. The flow rates required to channel out the scab lands of washington (basalt) are crazy. It is not possible for them to have been just lake Missoula. It had to require a much larger and more sudden flow rate -- from the ice sheet experiencing a comet impact.
Nice video. Thanks for that.
Good to see that the Younger Dryas is starting to get the attention it deserves; it looks like it had a far greater impact on the planet than we previously thought - especially if a comet really was involved ( which, surprisingly - as time goes by - is looking more plausible ).
YOu seem to have missed the point of this video entirely.
The whole point is that the comet impact hypothesis is a simplistic way of ignoring everything else that likely contributed to the event.
Such an insanely massive flood as this would make anything less than a planet killer asteroid impact look like a mere footnote in history.
@CusterFlux - Your scenario has been left behind in favor of the evidence as seen on the planet.
Awesome video !! 👌💯
Thank you for emphasizing that these floods may have been caused by meteor impacts and other causes, despite them not being the leading theories/hypotheses. Mad respect!
well then what are the leading hypothesises. since 2007 when the impact theory was first known, sooo much evidence has been found to support it
an ice dam being able to hold back 600 cubic miles of water is impossible. there had to have been something that made the water melt instantaneously, and the impact theory can make that happen
@@21LAZgoo - As stated in the video, the flooding did not happen "instantaneously". And warming DOES tend to weaken ice!
@@MossyMozart there were instantaneous floods from meltwater epicenters though
as someone who is subbed to both scishow AND eons,
i was pretty confused when i saw both channels made a video about a flood. at the same time.
*_THANKS BLAKE_*
Nebraska used to be covered under water in certain areas. I have personally found, marine life fossils in my grandmother's driveway and there's only one way those would be located in the middle of nowhere and buried.
You say ice melting today may stop the warm current cycle. This would lead to refreezing in the northern latitudes, which would rebuild glaciers and ice caps and keep ocean levels from rising significantly. Seems like the Earth has ways of balancing herself out.
Balancing that involves countless deaths.
this is what killed all those big ice age animals, it almost killed off humans too but luckily it didnt
Hey it's him😀😀😀
Thank you
Eons popping up was a bit jarring but delightful
Stop in at the Bonnieville Dam on the OR side. They have a wonderful display that shows the flood. I saw that when I moved in to OR back in 1973.
Scishow, you should do an update of this episode, incorporating the Saginaw Bay impact, the black mat layer and the Carolina bays it created.
th-cam.com/video/FBDd2n5ClZ8/w-d-xo.html
As requested.
You will be disappointed though.
The ice dam theory does hold water when you run the physics. Pun intended.
after drinking too much i can promise you my flood thats coming out of my mouth is strong enough to trigger an ice age
Thank you.
The biggest single problem with the lake missoula ice dam is an ice dam of its supposed size would not be possible. Just by looking at the Iceland ice dams you should be able to realise this. Ice dams are leaking because they are in effect a glacier. Glaciers are porous. The water will leak through and under the ice and destabilise and then the water will be released by the dam failing. Has anybody seen a modern dam and how they are constructed? They are everything an ice dam isn't. They don't leak and are anchored solidly into the bed rock.
The other point I have not seen mentioned in any mainstream science paper or article is a solution to the energy descreprancy needed to melt all that ice in the short time span that it melted in. The only proposal that has any possibility of accuracy is by Randall Carlson and his ilk. No earthly origin of the energy is possible. It melted too fast. If it was just dumped into the Sahara 13000 ya it would be still melting even today.
This to me needs to be answered ASAP. if it was an earthly source it needs to be identified. If a galactic origin it needs to be identified likewise so we will not be caught with our pants down and wiped out. All proposals are theory. Disprove them all until there is only one left. Then ask can this happen again?
Please remember if something happened in the past it can happen again. The question is not if but when.
There are pretty darn bug lakes UNDER the antarctic ice - and even with all the warming we're causing it's not likely to collapse for a while.
Anyway, I think you're misunderstanding the structure here. The ice would be anchored in mountains, and the ice would be melting from the top, in the middle. So it would be a massive ice "bowl" (so more like a dam than just a wall). And it DID collapse, that's what it's all about.
And after it collapsed? Well, ice melts faster in water than in air. The freshwater would start the process out in the Atlantic, the ice would keep it going for a while.
Not a good analogy at all. You can't compare glaciers in Iceland to the Laurentide ice sheet. The Laurentide was miles thick and so heavy that it deformed the earth's crust underneath. It's sheer size alone would insure that it was well anchored and it's vast expanse would have stopped it from "leaking".
There is so much content about the Missoula Lake flood and Scablands, but I k one for a fact there are tonnes of recent mega floods that have happened near my hometown. I live in Whitehorse, Yukon, Canada. One such megaflood happened about 100 miles to the east a little over 200 years ago, that is so recent that the people who lived In the region at the time, who’s descendants are still living here, have passed on stories about the sudden departure of a lake. I wish there was more videos out there on this subject. I find it a lot more fascinating mostly because there is testimonial evidence, even though it’s heresay, there is still a lot of truth supported by physical evidence. Yes it’s fascinating learning about events that happened thousands of years ago, but isn’t it equally, if not more, fascinating to explore much more recent geologic activities? I think so. Really found this video fascinating talking about the Mackenzie River and effects of a sudden mass of fresh water being introduced into the ocean and it’s potential effects that were globally significant.
I remember according to my kids i was there
I knew this for a long time, I knew that's what they model the movie The Day after Tomorrow about!! It just made so much sense! I think the History channel did something exactly like this about the Niagara falls area!!! At one time so much water came down in a rush that it knocked out a mountain between the river and the ocean to where it changed the course of the river by knocking out that mountain. Now that's a lot of water! Great video!! I think stopping that conveyor belt in the North Atlantic is the only thing that can save us from global warming. If it could start another small ice age it might just save us. It'll get hotter at the equator but it will get colder up top and as long as it gets cold enough to start bigger ice sheets and making them spread that's all we need!
If there's an ice age but nobody is there to feel it, was it cold?
But people were there
I would say "No". Since hot and cold are subjective feelings.
Edit: I accidentally wrote yes instead of no.
Cold is just the absence of heat, if there wasn’t anything around that had heat, was it really cold?
The channeled scablands are very pretty. Great episode guys!
For more, check out the PBS Eons episode about epic floods: th-cam.com/video/YWZgfPGtQEs/w-d-xo.html
Top 10 Crossovers of All Time
I prefer living in boring times and reading about interesting times.
That sounds familiar. Sir Pratchett fan?
I enjoyed this.
Isn't this the plot to Day After Tomorrow?
I remember leaving the theater as a teenager thinking "Wow are we all screwed!"
Bros so much knowledge in under 6 minutes
So could this explain the prevalence of flood myths in nearly every culture?
The deluge in Noah's day was a worldwide event, so when mankind spread they related the account to their descendants of it got corruoted over time
I think that’s a very good explanation Gautam
@@JasonJacksonJames it was written as a worldwide event but how would he know?
Yes this has been suggested. See the wiki page for Lake Agassiz
@MrGksarathy - Of course not. People in the past faced just as many catastrophes as today, but without any organized way to deal with them. People who lived in grass/wooden dwellings were vulnerable to all kinds of things and therefore have legends about them.
They were also vulnerable to flooding that could come out of nowhere and sweep away their dwellings, stored foods, and relatives. How would somebody living 13,000 years ago know that a flood was a global event or even just a regional or merely local one? Floods, along with fires, droughts, infestations severe weather were all disasters that peoples everywhere had to face ALL THE TIME.
Most people lived on the banks of a river or the shore of an ocean. Any disruption could cause flooding. A local flash flood on the Whatever River would be just as devastating to a small village as a larger flood.
great video
So you're telling me Ice Age : The Meltdown was a documentary?
PBS eons is fucking awesome, everybody go subscribe there
oof, this would be a great Tierzoo video.
Nick at Central Washington University explains the floods and the resulting landscape much better in his videos on his channel and the older videos at CWU.
I am writing about this event for my Geographic Inquiry class. Any chance I can get links to the research papers you guys used to make these videos?
Go look up the impact theory by the firestone team
1:11 No wonder Minnesota has so many lakes!
So... the reduction of AMOC can potentially oppose global warming? And the failure of AMOC might throw us a little ice age? Can we survive cold weather more easily than hot, violent weather?
Always questions with answers unavailable during my life span.
- "So... the reduction of AMOC can potentially oppose global warming?"
No, but it may start a chain reaction that causes a temporary and destructive shift in the opposite direction until Earth re-stabilizes to the conditions of the higher energy influx.
Global warming isn't strictly global. There are some areas that are cooling as a result, but all of this is extremely local. Someone correct me.
According to a paper I SERIOUSLY READ JUST 4 HOURS AGO! "Further melting of Greenland in the coming decades could contribute to further weakening of the AMOC." So part of global warming?
Source: Exceptional twentieth-century slowdown in Atlantic Ocean overturning circulation
I think we need to be worried long before we see the formation of a lake surrounded by glacier, 10 times the size of lake superior, but yes, in theory, something like this could affect the Atlantic current and affect climate, but the CO2 driven warming would still be in place. The effect would be different this time, probably not 1000 years of cooling, but something else. Hard to say exactly what.
Hope the answers are not available in your life span. Finding out the hard way could be problematic.
If you find this interesting, look into Randall Carlson's research into this topic. He details the geologic information of this flood, and has much more information pointing to the comet impact hypothesis. There is a lot of information being left out of this video, such as the Younger-Dryas impact layer of material, filled with high-energy impact evidence such as shocked quartz, carbon spherals, iridium, just to name a few. This layer covers four continents and is an abrupt end to the clovis culture. There are no clovis artifacts above this layer. The flow rates required to channel out the scab lands of washington (basalt) are crazy. It is not possible for them to have been just lake Missoula. It had to require a much larger and more sudden flow rate -- from the ice sheet experiencing a comet impact
Explains why dozens of cultures around the world have folklore about a great flood.