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Ice core data from Greenland reveals something that challenges everything we think we know about climate stability. The evidence shows that during the last ice age, temperatures shifted from full glacial to interglacial conditions not once, but twice, and each transition happened in just three to five years. Not... centuries. Not decades. Three to five years. The measurements come from annual ice layer thickness spanning fifteen thousand years, and the pattern is unmistakable. What caused these rapid shifts remains unknown. The mechanisms driving such extreme transitions are still not understood. But the implications are staggering. If a shift like that happened today, moving from our current interglacial state into glacial conditions over the span of five years, modern civilization would not survive it. The infrastructure, agriculture, and systems we depend on are built for climate stability. A return to ice age conditions in half a decade would collapse all of it. That is not speculation. That is what the data tells us is possible.show more

Randall Carlson

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79,926 views • 8 days ago •via X (Twitter)

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21 Comments

Chef Nazty ☕️8 days ago

I wonder if our gas guzzling SUVs or cow farts had any impact back then…

RickÖ8 days ago

What do we even know about the ice sheet of Greenland? Here’s the story about a squadron that got lost over 🇬🇱 in 1942. Some guys wanted to dig it out 50 years later, believing what “science” told them about how deep they’d have to dig, which would be 30-40’. Reality? 268’.

Alex GM7 days ago

The world is flat bro.

Carcharodon Carcharias7 days ago

Oh Shit! Get ready for a Level 10 geek out from climate change Poindexters

Ingenitorium Techné7 days ago

There is no evidence that our species had the tech we have today. The progress made in current technologies may enable us to mitigate anything adverse as our ancestors experienced? Certainly will be trying ,given our wherewithal now, no historical paradigms have any precedence?

Ross Stevens7 days ago

That's been my argument for years. If it turns cold, we're in trouble.

SaltGrains_RiggaForge7 days ago

The proper name for it is GLACIERLAND.

Karahan Billy8 days ago

I'm assuming this hasn't happened just twice but many times as ice sheets advance and retreat. Sea levels drop as ice sheets and vast glacial lakes form leading to massive floods shutting down coastal currents. Once the floods end the pent up warming resumes. YD followed floods.

Jeffrey Moore8 days ago

Ha ha ha Wrong Greenland is the blueprint piece of the mass/volume displacements Of the great flood Apparently you don’t converse when you know your theoretics of many sciences have been defeated by a rock that shows over and over in the clouds as splashes that created them .

ambercoxisaterrorist8 days ago

Interesting 🤔🧐

Monty Bvrns7 days ago

Personally I think "civilizational" collapse is inevitable at this point, either man made or nature driven. Colonize space seems logical just hope we don't bring the dark side of human nature with us (spoiler: we will).

Kevin McLaughlin7 days ago

The next one begins in the late 2030s to mid 2040s. Prepare accordingly.

C8 days ago

Apart from bolides, the Sun's activity remains the chief suspect. Perhaps even massive bolides hitting the Sun?

OccupiedBritain 🇬🇧8 days ago

@ReggieBoenzxz

Markus T James8 days ago

what was the interval between the two shifts?

Putzywoo8 days ago

There are a limited number of people that will be able to survive this. Most won't.

Robert Rand7 days ago

@grok where is the data located- link

Tteeghen Machen🇺🇸7 days ago

Could have been volcanic activity

Mark Jauregui7 days ago

The Younger Dryas era comes to mind. And climate change,, well..... Not...

Greg Sweeney7 days ago

If it happened 2 times there's more than a fair chance it will happen again . Earth could possibly wobble into a lower sun footprint for the northern most regions of earth . Right now we are in a higher more direct footprint this is according to A study called NASA solves mystery of wobbling earth.

RCOHoje7 days ago

Climate science calls these 3 to 5 year transitions a mystery, but the data simply reveals the reality of cyclic planetary resets. The idea of long term climate stability is a modern myth sold to the public. The managers of the system have always known that Earth operates on violent, short window purges. Modern infrastructure is fragile by design because surface civilization is meant to be rebuilt after every cycle. The protocol for surviving these sudden shifts and managing the aftermath traces directly back to Genesis 6. You can learn more about this thesis in my book:

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The genetic data is pointing toward something dramatic: a severe population bottleneck at the end of the last ice age. Between roughly 14,500 and 11,000 years ago, approximately six million cubic miles of glacial ice disappeared from the continents in just three millennia. That ice had accumulated rapidly starting around 26,000 to 30,000 years ago, and its swift buildup remains poorly explained. What followed was equally extreme. The ice didn't just melt gradually. It converted into water and transferred into the oceans through floods of unimaginable scale. The thermal energy required to drive that kind of melting in such a short span is staggering, and the source of that energy is still not well understood. If the ice melted that fast, what forced it? And if floods of that magnitude reshaped entire landscapes, what did they do to the human populations living through it?

The genetic data is pointing toward something dramatic: a severe population bottleneck at the end of the last ice age. Between roughly 14,500 and 11,000 years ago, approximately six million cubic miles of glacial ice disappeared from the continents in just three millennia. That ice had accumulated rapidly starting around 26,000 to 30,000 years ago, and its swift buildup remains poorly explained. What followed was equally extreme. The ice didn't just melt gradually. It converted into water and transferred into the oceans through floods of unimaginable scale. The thermal energy required to drive that kind of melting in such a short span is staggering, and the source of that energy is still not well understood. If the ice melted that fast, what forced it? And if floods of that magnitude reshaped entire landscapes, what did they do to the human populations living through it?

Randall Carlson

28,539 views • 13 days ago

Ten to twenty-five thousand years ago, vast regions of Earth were buried under ice. Enough ice to equal today’s Greenland and Antarctica combined… twice over. The mystery is not that the ice melted. The mystery is how it melted so fast. Despite decades of research, there is still no clear answer for what triggered the end of the Ice Age. The energy required is staggering, and the timeline challenges long-held assumptions.

Ten to twenty-five thousand years ago, vast regions of Earth were buried under ice. Enough ice to equal today’s Greenland and Antarctica combined… twice over. The mystery is not that the ice melted. The mystery is how it melted so fast. Despite decades of research, there is still no clear answer for what triggered the end of the Ice Age. The energy required is staggering, and the timeline challenges long-held assumptions.

Randall Carlson

36,785 views • 8 months ago

The Younger Dryas represents the kind of climate shock that would fundamentally dismantle modern civilization. Within the last 250,000 years, Earth has cycled through four major glacial-interglacial periods, each one punctuated by extreme variability. The previous interglacial, the Eemian, lasted roughly 12,000 years and experienced multiple sharp temperature spikes and drops, events that reshaped ecosystems and forced human populations to adapt or perish. The Younger Dryas itself stands out as one of the most abrupt and severe climate reversals in the geologic record. If a comparable event occurred today, with the same speed and magnitude, the infrastructure, agriculture, and supply chains that sustain billions of people would collapse. We would quite literally be returned to Stone Age conditions, not because of nuclear war or societal failure, but because the climate system itself can shift with terrifying speed.

The Younger Dryas represents the kind of climate shock that would fundamentally dismantle modern civilization. Within the last 250,000 years, Earth has cycled through four major glacial-interglacial periods, each one punctuated by extreme variability. The previous interglacial, the Eemian, lasted roughly 12,000 years and experienced multiple sharp temperature spikes and drops, events that reshaped ecosystems and forced human populations to adapt or perish. The Younger Dryas itself stands out as one of the most abrupt and severe climate reversals in the geologic record. If a comparable event occurred today, with the same speed and magnitude, the infrastructure, agriculture, and supply chains that sustain billions of people would collapse. We would quite literally be returned to Stone Age conditions, not because of nuclear war or societal failure, but because the climate system itself can shift with terrifying speed.

Randall Carlson

13,880 views • 23 days ago

Ice core data shows it: 10 to 12°C of warming hit the Earth in just 1 to 3 years—not millennia, not centuries. That’s 20 times the rate of modern warming. So what did our ancestors do to survive such a violent shift? And more importantly… could we do the same?

Ice core data shows it: 10 to 12°C of warming hit the Earth in just 1 to 3 years—not millennia, not centuries. That’s 20 times the rate of modern warming. So what did our ancestors do to survive such a violent shift? And more importantly… could we do the same?

Randall Carlson

82,750 views • 1 year ago

The last great ice age terminated in a geological instant - trillions of tons of ice melting away within a few thousand years. Randall’s challenge is direct and pointed. Where did the thermal energy come from to drive that transformation at that speed? There is no consensus answer. The mechanisms that trigger the onset of an ice age and those that bring about its termination remain scientifically unresolved - competing theories exist, but no framework has achieved the kind of broad agreement that would qualify as settled science. That gap matters enormously to Randall because of what is claimed in its absence. If the scientific community cannot reach consensus on what causes ice ages to begin or end - processes that have reshaped this planet repeatedly within the human timeline - then the assertion that climate science is settled becomes extremely difficult to defend. Randall is not dismissing the study of climate. He is pointing at a fundamental inconsistency - that the most dramatic climate events in Earth's recent geological history remain without agreed explanation, while certainty is simultaneously claimed about the mechanisms driving change today. The thermal energy that ended the last ice age is still unaccounted for. That is not a minor footnote. It is a problem at the center of the entire conversation.

The last great ice age terminated in a geological instant - trillions of tons of ice melting away within a few thousand years. Randall’s challenge is direct and pointed. Where did the thermal energy come from to drive that transformation at that speed? There is no consensus answer. The mechanisms that trigger the onset of an ice age and those that bring about its termination remain scientifically unresolved - competing theories exist, but no framework has achieved the kind of broad agreement that would qualify as settled science. That gap matters enormously to Randall because of what is claimed in its absence. If the scientific community cannot reach consensus on what causes ice ages to begin or end - processes that have reshaped this planet repeatedly within the human timeline - then the assertion that climate science is settled becomes extremely difficult to defend. Randall is not dismissing the study of climate. He is pointing at a fundamental inconsistency - that the most dramatic climate events in Earth's recent geological history remain without agreed explanation, while certainty is simultaneously claimed about the mechanisms driving change today. The thermal energy that ended the last ice age is still unaccounted for. That is not a minor footnote. It is a problem at the center of the entire conversation.

Randall Carlson

19,756 views • 6 months ago

He describes the Younger Dryas as the last gasp of the ice age, a period that defies simple explanations. After thousands of years of gradual warming, the planet plunged back into full glacial conditions in less than a year. That reversal lasted twelve to thirteen hundred years before the climate lurched out of it just as abruptly, if not faster. The speed and magnitude of these shifts challenge conventional thinking about how climate systems operate. He emphasizes that this wasn't a slow drift but a catastrophic snap, both entering and exiting the cold period. The evidence points to mechanisms far more dramatic than the gradual processes typically invoked in mainstream climate science.

He describes the Younger Dryas as the last gasp of the ice age, a period that defies simple explanations. After thousands of years of gradual warming, the planet plunged back into full glacial conditions in less than a year. That reversal lasted twelve to thirteen hundred years before the climate lurched out of it just as abruptly, if not faster. The speed and magnitude of these shifts challenge conventional thinking about how climate systems operate. He emphasizes that this wasn't a slow drift but a catastrophic snap, both entering and exiting the cold period. The evidence points to mechanisms far more dramatic than the gradual processes typically invoked in mainstream climate science.

Randall Carlson

27,079 views • 4 months ago

Today's warming is not unusual. A new study using Antarctic ice core data reveals the roughly 1.1C warming of the past century is not unusual in Earth's climate history. The research analyzes temperatures preserved in ice cores stretching back hundreds of thousands of years. Looking at the last 20,000 years, the study finds that 16% of all centuries warmed by at least 1.1C. In other words, roughly one out of every six centuries warmed as much, or more, as the past hundred years. Also, the ice core records show temperatures rising about 12C since the last ice age, with the last interglacial period around 125,000 years ago several degrees warmer than today. The modern 1.1C century scale increase falls well within natural variability. There is nothing alarming or unprecedented or even rare occurring with Earth's climate.

Today's warming is not unusual. A new study using Antarctic ice core data reveals the roughly 1.1C warming of the past century is not unusual in Earth's climate history. The research analyzes temperatures preserved in ice cores stretching back hundreds of thousands of years. Looking at the last 20,000 years, the study finds that 16% of all centuries warmed by at least 1.1C. In other words, roughly one out of every six centuries warmed as much, or more, as the past hundred years. Also, the ice core records show temperatures rising about 12C since the last ice age, with the last interglacial period around 125,000 years ago several degrees warmer than today. The modern 1.1C century scale increase falls well within natural variability. There is nothing alarming or unprecedented or even rare occurring with Earth's climate.

Electroverse

17,876 views • 3 months ago

The terminal moraines left by Little Ice Age glaciers are preserved across the landscape worldwide, and what they show is unambiguous - those glaciers reached their greatest extent since the end of the great Ice Age approximately 11,000 years ago. The Little Ice Age represented a cold extreme within the Holocene, not a neutral mid-point in a stable climate system. Randall Carlson's argument is geological rather than political. When sea level rise and temperature increase are measured against a baseline drawn from the end of the Little Ice Age, that baseline sits at one of the coldest points of the last 10,000 years. A return from an anomalous cold extreme toward the warmer conditions that characterised most of the Holocene will, by definition, produce an upward curve on any graph. Understanding what that curve actually represents - a recovery from a cold outlier or something genuinely unprecedented - requires placing it within the full context of natural climate variability over deep time. The terminal moraines are part of that context, and they are rarely part of the conversation.

The terminal moraines left by Little Ice Age glaciers are preserved across the landscape worldwide, and what they show is unambiguous - those glaciers reached their greatest extent since the end of the great Ice Age approximately 11,000 years ago. The Little Ice Age represented a cold extreme within the Holocene, not a neutral mid-point in a stable climate system. Randall Carlson's argument is geological rather than political. When sea level rise and temperature increase are measured against a baseline drawn from the end of the Little Ice Age, that baseline sits at one of the coldest points of the last 10,000 years. A return from an anomalous cold extreme toward the warmer conditions that characterised most of the Holocene will, by definition, produce an upward curve on any graph. Understanding what that curve actually represents - a recovery from a cold outlier or something genuinely unprecedented - requires placing it within the full context of natural climate variability over deep time. The terminal moraines are part of that context, and they are rarely part of the conversation.

Randall Carlson

25,152 views • 5 months ago

Half of Greenland's ice sheet disappeared during the last interglacial period, around 125,000 years ago. Sea levels rose 20 to 25 feet higher than today, not because of human activity, but because natural climate cycles had pushed the planet into one of its warmest phases in recent geological history. The ice melted so extensively that Greenland split into two separate ice domes with a broad corridor of exposed land running east to west across its midsection. This wasn't a minor fluctuation. This was a dramatic transformation of one of Earth's largest ice masses, and it happened without any industrial influence whatsoever. The evidence forces a question: if natural processes alone can drive changes this extreme, how do we separate natural variability from modern forcing in our current climate models? The geological record is unambiguous. Something else has always been going on here, and understanding that context is essential to making sense of where we are now.

Half of Greenland's ice sheet disappeared during the last interglacial period, around 125,000 years ago. Sea levels rose 20 to 25 feet higher than today, not because of human activity, but because natural climate cycles had pushed the planet into one of its warmest phases in recent geological history. The ice melted so extensively that Greenland split into two separate ice domes with a broad corridor of exposed land running east to west across its midsection. This wasn't a minor fluctuation. This was a dramatic transformation of one of Earth's largest ice masses, and it happened without any industrial influence whatsoever. The evidence forces a question: if natural processes alone can drive changes this extreme, how do we separate natural variability from modern forcing in our current climate models? The geological record is unambiguous. Something else has always been going on here, and understanding that context is essential to making sense of where we are now.

Randall Carlson

14,135 views • 4 days ago

He points to a fact that reshapes how we think about lost civilizations: the coastlines of the Ice Age are now 400 feet underwater. During the Last Glacial Maximum, sea levels were dramatically lower, and the most habitable places on Earth would have been coastal zones with access to marine resources and milder climates. If advanced settlements existed 14,000 years ago, they would have been built where port cities still thrive today, along shorelines that are now deep beneath the ocean. He argues that the future of archaeology lies in marine exploration, not because of speculation, but because that's where the evidence would logically be. The drowned continental shelves hold the key to understanding what was lost when the ice melted and the seas rose.

He points to a fact that reshapes how we think about lost civilizations: the coastlines of the Ice Age are now 400 feet underwater. During the Last Glacial Maximum, sea levels were dramatically lower, and the most habitable places on Earth would have been coastal zones with access to marine resources and milder climates. If advanced settlements existed 14,000 years ago, they would have been built where port cities still thrive today, along shorelines that are now deep beneath the ocean. He argues that the future of archaeology lies in marine exploration, not because of speculation, but because that's where the evidence would logically be. The drowned continental shelves hold the key to understanding what was lost when the ice melted and the seas rose.

Randall Carlson

18,760 views • 2 months ago

Geologist Prof. Ian Plimer: "It was much warmer a thousand years ago." "And then we entered the Little Ice Age... And since the Little Ice Age ended, what do you think happened?" "It's going to warm up, isn't it? And that's what's happened." "So the real question is, which part of the modern warming is of human origin, and which part is natural? Because we are not as warm as in medieval times, or in Roman times, or in Minoan times."

Geologist Prof. Ian Plimer: "It was much warmer a thousand years ago." "And then we entered the Little Ice Age... And since the Little Ice Age ended, what do you think happened?" "It's going to warm up, isn't it? And that's what's happened." "So the real question is, which part of the modern warming is of human origin, and which part is natural? Because we are not as warm as in medieval times, or in Roman times, or in Minoan times."

Wide Awake Media

281,597 views • 9 months ago

When continental ice sheets reached their maximum extent during the last glacial period, they locked up roughly 6 million cubic miles of ocean water. That volume had to come from somewhere, and the evidence shows it came directly from the world's oceans. Sea level dropped at least 400 feet, with some estimates placing it closer to 450. That's not a theoretical model, that's what the geomorphology and coastal evidence tell us. Today there's concern about sea level rising a foot or two over the next century. That's worth monitoring. But context matters. At the end of the last ice age, as those ice sheets collapsed and returned their water to the oceans, sea level rose more than 400 feet. That's not speculation, that's what happened. Understanding the scale of natural variability in Earth's climate system isn't about dismissing current concerns. It's about grounding those concerns in the full scope of what this planet is capable of.

When continental ice sheets reached their maximum extent during the last glacial period, they locked up roughly 6 million cubic miles of ocean water. That volume had to come from somewhere, and the evidence shows it came directly from the world's oceans. Sea level dropped at least 400 feet, with some estimates placing it closer to 450. That's not a theoretical model, that's what the geomorphology and coastal evidence tell us. Today there's concern about sea level rising a foot or two over the next century. That's worth monitoring. But context matters. At the end of the last ice age, as those ice sheets collapsed and returned their water to the oceans, sea level rose more than 400 feet. That's not speculation, that's what happened. Understanding the scale of natural variability in Earth's climate system isn't about dismissing current concerns. It's about grounding those concerns in the full scope of what this planet is capable of.

Randall Carlson

55,214 views • 27 days ago

Start with a single cubic mile of ice and convert it instantaneously to water. The flood that produces would be enormous by any human standard. Now multiply that by six million - the estimated volume of glacial ice sitting on the continental landmasses of North America and Eurasia at the peak of the last Ice Age. All of it is gone now. The question Randall Carlson forces is deceptively simple: how fast did it go? If that volume of ice melted gradually over 50,000 or 100,000 years, the resulting sea level rise and meltwater discharge would be spread thinly enough across time to look almost imperceptible in any given century. But if the same six million cubic miles of ice melted over three, four, or five thousand years - as the evidence increasingly suggests - the implications are categorically different. The meltwater pulses, the catastrophic floods, the rapid sea level rises recorded in the geological record all point toward a process that was far faster and far more violent than the gradualist model has ever been comfortable acknowledging. The ice did not gently fade. It collapsed. Join Randall in the field in New York State for his Finger Lakes Tour, Aug 30 - Sep 5, 2026:

Start with a single cubic mile of ice and convert it instantaneously to water. The flood that produces would be enormous by any human standard. Now multiply that by six million - the estimated volume of glacial ice sitting on the continental landmasses of North America and Eurasia at the peak of the last Ice Age. All of it is gone now. The question Randall Carlson forces is deceptively simple: how fast did it go? If that volume of ice melted gradually over 50,000 or 100,000 years, the resulting sea level rise and meltwater discharge would be spread thinly enough across time to look almost imperceptible in any given century. But if the same six million cubic miles of ice melted over three, four, or five thousand years - as the evidence increasingly suggests - the implications are categorically different. The meltwater pulses, the catastrophic floods, the rapid sea level rises recorded in the geological record all point toward a process that was far faster and far more violent than the gradualist model has ever been comfortable acknowledging. The ice did not gently fade. It collapsed. Join Randall in the field in New York State for his Finger Lakes Tour, Aug 30 - Sep 5, 2026:

Randall Carlson

99,091 views • 5 months ago

Geologist Prof. Ian Plimer thoroughly refutes the UN's man-made "global boiling" myth. "It was much warmer [than today] a thousand years ago." "And then we entered the Little Ice Age... And since the Little Ice Age ended, what do you think happened?" "It's going to warm up, isn't it? And that's what's happened." "So the real question is, which part of the modern warming is of human origin, and which part is natural? Because we are not as warm as in medieval times, or in Roman times, or in Minoan times."

Geologist Prof. Ian Plimer thoroughly refutes the UN's man-made "global boiling" myth. "It was much warmer [than today] a thousand years ago." "And then we entered the Little Ice Age... And since the Little Ice Age ended, what do you think happened?" "It's going to warm up, isn't it? And that's what's happened." "So the real question is, which part of the modern warming is of human origin, and which part is natural? Because we are not as warm as in medieval times, or in Roman times, or in Minoan times."

Wide Awake Media

215,891 views • 11 months ago