When the Earth Suddenly Stopped Warming 

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For decades, scientists have been studying the cause of the Younger Dryas, and trying to figure out if something like it could happen again. And it turns out that what caused this event is the subject of a heated debate.
Thanks to these wonderful paleoartists for their excellent illustrations!
Jack Byrley: bedupolker
Fabrizio De Rossi: ArtofFabricious
Julio Lacerda: JulioTheArtist
Produced in collaboration with PBS Digital Studios: iritem.info
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References: docs.google.com/document/d/1CayoCGYjyyxwEtm5YhLZueN5LAybV4qtGOIJRORd-As/edit?usp=sharing

علم و فناوری

تاریخ انتشار


2020 17 دسامبر





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PBS Eons
PBS Eons پیش 5 ماه
Hi all! A quick correction: at 9:17, our temperature conversion graphic mistakenly converts the temperature difference as an absolute temperature. A change of 10°C is equivalent to 18°F. We apologize for the error and a big thanks to VUQuadrophenia for pointing this out to us!
Daniel Keuchel
Daniel Keuchel پیش 14 ساعت
Thank you for this, i was just coming to see if anyone had pointed it out yet
Brad Cupitt
Brad Cupitt پیش ماه
I believe it’s a combination of these things with the asteroid impact being the trigger
Andy Greeley
Andy Greeley پیش 2 ماه
I just now opened the comments to point this out. Yours, pedantically. Andy
WestOfEarth پیش 4 ماه
I dislike that the scientific dialog around this even has 'tribalized'. Why couldn't the Younger Dryas Event be all three? It seems to me there is strong evidence for all three, and yet each camp tries to claim it was the sole cause. An asteroid or comet bursts over the Laurentide Ice sheet, causing the ice dams to break, sending the flood waters into the Atlantic and Pacific. The loss of this enormous mass causes the crust to flex, triggering volcanic events like the one in Germany. Bam! Solved. It all ties up so nicely without the unnecessary bravado of each camp.
Benjamin Konkal
Benjamin Konkal پیش 4 ماه
Mekratrig پیش 2 روز
I had the impression the "Carolina Beys" depressions along the east coast were conclusive evidence the Younger Dryas was caused by a comet or meteor that struck the massive ice sheet covering much of North America. The ejecta from the impact consisted of huge chucks of ice, which, when they landed, caused the Beys formation, most of which are remarkably similar ellipses of all sizes that 'point' to an impact point in the Saginaw Bay area of the Great Lakes. And of course, being chunks of ice, they melted, leaving little or no residue of the impactor.
kai doyle
kai doyle پیش 3 روز
Listen on 0.75x speed
gregory kern
gregory kern پیش 10 روز
clearly man-made global warming caused it.........could'nt have been the planets natural cycle.... :~
Max Fochtmann
Max Fochtmann پیش 10 روز
Спасибо большое, так интересно. Только сейчас я понял выражение " Dryas"....
Daniel Rodriguez
Daniel Rodriguez پیش 11 روز
So not just and astriod or metor impact but a lot of of impacts
Yash Gaikwad
Yash Gaikwad پیش 15 روز
In India it is more hotter than death valley. Literally it is hell in summer if you don't have ac. I seriously can't live in this.
Eric Muschlitz
Eric Muschlitz پیش 16 روز
Soon, volcanoes make glaciers, so let's drill holes in the crust and make NEW volcanoes to moderate the warming! See, it's not rocket surgery!😆
Lynn Wood
Lynn Wood پیش 16 روز
See you tube posts by Antonio Zamora regarding Carolina Bays and the Younger Dryas Impact Event. There is evidence of an asteroid or comet impact hitting the glacier over what is now Saginaw Bay, north and western South America, Greenland and Europe into Eurasia. The impact upon North America is estimated to have caused North America from the Rockies to the Atlantic to have been cover in a meter of ejected ice within minutes of impact
Manic Mercurian
Manic Mercurian پیش 17 روز
Idk mate. Ice dam theory has lots of cracks and holes in it... Almost as much as ice does
Purzius پیش 22 روز
I love this channel, have been binging it a lot ever since I found it! Always fascinated
Ayanami پیش 24 روز
So will our climat change make europe warmer or colder, because of the loss of the conveir belt.
Benoit Massicotte
Benoit Massicotte پیش 24 روز
Climate change is... Natural and unavoidable.
Jim Krause
Jim Krause پیش 24 روز
Doesn't it seem possible that all three hit the Earth at about the same time like a one-two-three punch?
JeremyWK پیش 24 روز
Nearly every major cooling event in the last 800,000 years was preceded by a major warming event.
Richard Wong
Richard Wong پیش 29 روز
My money’s on the meteor strike, if not all of the above lol
Brian F
Brian F پیش ماه
Carolina Bays! Please do an episode on the Carolina Bays.
Mark Sciscenti
Mark Sciscenti پیش ماه
Some of the newest geologic evidence shows that there were comet fragments that regularly impacted the planet over a 20 year period from the Taurids, which was a massive comet that broke up over time. Along with the actual impact debris (which left a layer of physical evidence), the planet experienced huge continental fires which created enough smoke and ash to obscure the sun for years (this left evidence worldwide in a geological layer). This along with the collapse of a couple ice dams releasing fresh water and volcanology contributed mightily to the Younger Dryas ice age. And the almost immediate (geologically speaking) extinction of the megafauna. So it was multiple causes precipitated by the comets impacts that caused the Younger Dryas. Quite a few geologists and anthropologists/archaeologists have collaborated and put forth papers on all this evidence within the last 4 years. It’s only a matter of time and further evidence that will fully confirm this. And yes, there is a lot of controversy among the various scientific factions, which is slowly being whittled down as mew evidence comes forth every year.
Nathan Frey
Nathan Frey پیش ماه
When the earth suddenly stop warming...aka thousands of years ago as well as today.
Atlas Aqua
Atlas Aqua پیش ماه
Why is it always just one hypothesis? Couldnt all of these be somewhat responsible?
Robert Richardson
Robert Richardson پیش ماه
I've been chasing this meteor impact event around 12,000 bc for decades.
Oi! پیش ماه
NO! hello fresh is not worth the money
Sean Foltz
Sean Foltz پیش ماه
Why not a Maunder Minimum? They've been responsible for mini ice ages like this so why couldn't they have either been responsible or contributed to this one?
Ante Meridiem
Ante Meridiem پیش ماه
So you could say the oceans run... AMOC (amuck)
D Army
D Army پیش ماه
Mate that was 'eons' ago
GrrMeister پیش ماه
*12k Years ago I would have been under ½ Mile of Ice in the Midlands UK*
Richard Blais
Richard Blais پیش ماه
Only the Y-D Impact Hypothesis is heavily debated and controversial ... by the way, they forgot to mention the Carolina Bays ...
CeNedra Lea Heldra
CeNedra Lea Heldra پیش ماه
I would like to thank everyone who puts this information together. I really enjoy it. I understand that the information is delivered quick but concise. It is refreshing in a world of false information to be able to listen to such great content. Thank you all
S C پیش 2 ماه
This sounds like the plotline of the movie Scorcher VI: Global Meltdown starring Tugg Speedman.
Oscar Román
Oscar Román پیش 2 ماه
Check Antonio Zamora's work. He has a great approach on the impact hypothesis.
The Patriarchy
The Patriarchy پیش 2 ماه
The picture of the ice dam contradicts itself in all the vertical cracks.
Alexander Bazhanov
Alexander Bazhanov پیش 2 ماه
Unfortunately, humans are to blame the extinction of almost all big land mammals
Jason O'Connor
Jason O'Connor پیش 2 ماه
so is the blitzkrieg hypothesis out of the window for the megafauna extinction?
neomt2 پیش 2 ماه
That poor donkey 😢
J. A. Smith
J. A. Smith پیش 2 ماه
Watching this while thinking about the current climate disaster in Texas...
Twenty Five Bucks
Twenty Five Bucks پیش 2 ماه
The thing I find the most fascinating about the younger Dryas hypothesis is trying to find out which humans / other hominids adapted to climactic mass extinction because we will need that kind of adaptability very soon
Samuel Cohoon
Samuel Cohoon پیش 2 ماه
So a freshwater lake cooled the entire Atlantic Ocean due to a dam breaking...yeah not buying that
Isaac Miller
Isaac Miller پیش 2 ماه
Is Steve ok is the pandemic treating him well
Theresa Kish
Theresa Kish پیش 2 ماه
Around the 7:50 mark the video says that horses and bison went extinct in Texas while it was a forest? Then it turned into grassland and the mega fauna went extinct? Question? Wouldn't those mega fauna thrive in that environment. How did these mega fauna survive forests?
MRGRUMPY53 پیش 3 ماه
I'm all in on the fresh water theory destroying the Gulf Stream. (and maybe a Meteor)......The same thing might happen if Greenland's ice cap keeps on melting at it's present rate.
Tarbosaurus Battar
Tarbosaurus Battar پیش 3 ماه
Can you make a video about Deinosuchus?
Tarbosaurus Battar
Tarbosaurus Battar پیش 3 ماه
Is this about the Ice Age?
Palmetto NDN
Palmetto NDN پیش 3 ماه
Science: There was drastic shifts in climate making animals extinct and changing the ecosystem...and all before the Industrial Revolution. Also science: Humans are the sole cause of climate change, regardless of what has happened before its all our fault now. Hmmmmmmm.........
Skippy پیش 2 ماه
Usually the previous changes took a long time or were results of natural disasters. Also, humans are not the sole cause. About %25 of greenhouse gas emissions are natural
WhackBytch پیش 3 ماه
"Huge amount of water" I don't think there are words do describe just how much water that was. It had to be as much as all the great lakes, combined 😵
Jennamomenna پیش 3 ماه
Could we reverse global warming if we all threw an ice cube into the ocean?
Skippy پیش 2 ماه
We could freeze Europe by doing that, and melting glaciers in Greenland could do it anyway
Zardoz4441 پیش 3 ماه
Here in Western Europe we now have a Younger Dryas Event for about two weeks.
Nicholas D'Abruzzo
Nicholas D'Abruzzo پیش 3 ماه
This channel is the best class i have this year.
KurtRu5selCrowe پیش 3 ماه
For the algorithm
Alex Gunawan
Alex Gunawan پیش 3 ماه
I begun wondering, how exactly future 1000 years later human will see the event when human population drop almost gone. All of them come to the same conclusion, mass stupidity pandemic.
Fishtank 101
Fishtank 101 پیش 3 ماه
*earth.exe has stopped working*
The Elite
The Elite پیش 3 ماه
1000th comment
Haris Wirananda
Haris Wirananda پیش 3 ماه
3:37 so this is what ice age 2 was talking about?
Perianna Terran
Perianna Terran پیش 3 ماه
Ok but that joke ACTUALLY got me. Nice one, guys.
Granny Gives Head
Granny Gives Head پیش 3 ماه
Considering how hard it is to kill a cow. The overhunting hypothesis isn't actually possible. There wasn't that much human population to megafauna extinct. Hunting megafauna, would be a once in a while epic adventure, considering how hard it would be. Otherwise we wouldn't have buffalos, elephants and giraffes in Africa. They'd have provided epic meal sources, but they're very dangerous animals to kill with just a spear. Even for the bravest if hunters. Probably humans preferred medium prey. Like antelopes and deers. Less risk but could still feed an entire clan. Maybe it was just disease that wiped out the megafauna. We're already seeing signs, that it might be the one thing that will cause our extinction, why not theirs?
daily dose of lame shit
daily dose of lame shit پیش 3 ماه
when the earth suddenly stopped me : oh nooooo 😱 warming me : ah goddamn you, i thought it stopped spinning 😌
Brian Segers
Brian Segers پیش 3 ماه
Did he really say "before humans came top America"? Humans have been in the Americas for ocer 40,000 years. Makes no sense
CMDRKinAkuma پیش 3 ماه
The overkill theory is the dumbest thing I've heard in a while.
Kurushi پیش 3 ماه
I disliked because he is wearing too much clothes.
Christopher Graney-Ward
Christopher Graney-Ward پیش 3 ماه
Camels in Canada?
richard murphy
richard murphy پیش 3 ماه
I do not believe we ate the mega fauna in sufficient numbers we would need to be on horseback to hunt 🤔 out horses and camels and don't get me started on hyenas they don't look appetising at all
Andy Kane
Andy Kane پیش 4 ماه
Have them in our garden 😂
Carmela Lucy Martin
Carmela Lucy Martin پیش 4 ماه
i am still sad the steve is gone 😢
Konrad Nowak
Konrad Nowak پیش 4 ماه
I’ve Been binging the videos but never realized that I wasn’t subscribed. I swear I subscribed before must be a glitch.
Frogboyaidan پیش 4 ماه
jackvincent90 پیش 4 ماه
you havent accounted for the sun, the sun goes through cycles, has warm and cold periods.
jackvincent90 پیش 4 ماه
yeah your temperatures are way off, right now in those islands its -2c, and will happily hover around zero and happily go to -10c on really cold winter days. summer time will see 20+c
Juan Carlos Chávez Béjar
That damn that broke is the one Depicted in "Ice Age 2"?
Jane Wallace
Jane Wallace پیش 4 ماه
Winter temps in the UK are about zero centigrade. Please if you are supposed to be factual then please be factual.
Grimmer2006 پیش 4 ماه
Cant someone talk about how that little flower manage to at will pop up everywhere its the just right temperature for it? I mean, it didnt have legs to walk with. Did the seeds just "pre exist" everywhere? Or could lay dormant for loooong periods of time?
Veggieboy Ultimate
Veggieboy Ultimate پیش 4 ماه
Why would the megafauna go extinct during this cold period? Wouldn’t they have at least a chance to repopulate their species?
conner13.c1 پیش 4 ماه
I love how much knowledge we can achieve from studying something as little as a flower
Umberto Ricciardo
Umberto Ricciardo پیش 4 ماه
Cold mean extinction while warm mean prosperity. Some hypothesis are idiotic like melting water cause freezing and overhunting cause the extinction of the all megafauna. The sun is the only driver of clime on heart today. It started to get cooler, just watch!!
olly tropics
olly tropics پیش 4 ماه
That flower is clearly white
TOP 7 KIDS پیش 4 ماه
When it is a question of God's almighty Spirit, never say, 'I can't.'
Consuelo Mago
Consuelo Mago پیش 4 ماه
Ramses V
Ramses V پیش 4 ماه
So let me get this straight, We have had temperature change, climate change, worldwide many times and some times quite suddenly in the geological past without human interference? So, maybe everyone shouting Climate Change is just running around saying the sky is falling? Interesting.
Stephen Rafter
Stephen Rafter پیش 4 ماه
What about the people dieing off to. Humans were nearly extinct in this event. Did you forget we are on the planet to.
Controversial Chris
Controversial Chris پیش 4 ماه
I watched this when it aired.Three days later IRitem sneakily unsubscribed me. I can't understand why. I watch alot of stuff revolving aound climate and the least inflammatory has got to be this channel.
KawaiiLean 420
KawaiiLean 420 پیش 4 ماه
Might of been nibiru 😛
Nicholas Westbury
Nicholas Westbury پیش 4 ماه
Nice. 20 year shift in climate, into a 100 year dip and then shift out. Got it thanks.
Shannon Easterly
Shannon Easterly پیش 4 ماه
Hey PBS Eons! I appreciate that you give a land acknowledgement at the end of your video. This is a great start! Will you be giving any portion of your video profits to the affected nations and cultures? If not, it's a bit of an empty gesture.
inSpihr پیش 4 ماه
Damn can we get a live action makeover on these pictures tho? Can we afford an artist that is capable of this?
Roger Dudra
Roger Dudra پیش 4 ماه
Thank you for presenting a logical revue of the Younger-Dryas period complete with the rational explanation for the energy input needed to rid this planet of so much ice.
Walker Holmes
Walker Holmes پیش 4 ماه
confirmation global warming is cyclical
Phil Salmon
Phil Salmon پیش 4 ماه
Excellent video on the YD and connected questions. Seems the latest glaciations are so deep that it’s getting harder for the earth to escape from them back to interglacial. This shows that cold - not hot - is the really dangerous climate change.
Todd Stokes
Todd Stokes پیش 4 ماه
3:29 It's that bit from the Ice Age movie
William Litsch
William Litsch پیش 4 ماه
The majority of the humans diet at the time was meat. Their hunting these animals was proven. Every year we find out that humans arrived earlier. The cold periods occurred before and the megafauna didn't die. The science is obvious on this if you remove the futurist pro-human politics. Humans exacerbated climate change (which was always happening) and it sent these populations over the tipping point. It did it every single place humans arrived. Do better research.
anonjan82 پیش 4 ماه
Interesting to see that scientist cannot agree on what caused climate change in the past, but popular oppinion would have us believe they know what is going to happen in future.
Peter Eiso
Peter Eiso پیش 4 ماه
If a colde snap lasts 1200 years, what is meant my suddenly?
I might answerback
I might answerback پیش 4 ماه
Asteroids suck
Richard Pauli
Richard Pauli پیش 4 ماه
How very 1980's. Poorly researched. Not very current.
MLGODZILLA420 پیش 4 ماه
Then please give us accurate info if you actually have them.
Nate the Voice Music
Nate the Voice Music پیش 4 ماه
Most scientists won’t even discuss the impact hypothesis so I certainly appreciate seeing this 🙏🏻
Peggy Detmers
Peggy Detmers پیش 4 ماه
Although your presenter is very articulate, could you please ask your presenter to slow down his speech pattern.
Gi Gi
Gi Gi پیش 4 ماه
You can also change playback speed on IRitem videos yourself if it helps
Ayu Triandari
Ayu Triandari پیش 4 ماه
Pleaaase, more geology, earth history content with Blake as the host 😊😊😊😊😊
Ryuma King
Ryuma King پیش 4 ماه
Some believe that Göbleki Tepe depicts the meteorite impact.
Davis پیش 4 ماه
If you shrink your timeline from millions of years to thousands of years things make more sense.
E J پیش 4 ماه
I’m so happy they released a video on this. I’m so fascinated by this period.
Tran The Cutest
Tran The Cutest پیش 4 ماه
It's official: George Lucas has a time machine. That's how the Star Wars animals were "designed", he just went back in time and reproduced what he saw.
Tran The Clever
Tran The Clever پیش 4 ماه
Scientists: name lizards ‘lizards’ Also scientists: name dinosaurs ‘terrible lizards’ Dinosaurs: wtf bro :(
David Shelow
David Shelow پیش 4 ماه
Groovy! what a great show!
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