WE HOLD BOTH RECORDS
WE HOLD BOTH RECORDS
Humans Have Created Both the Hottest and Coldest Points in the Known Universe. Nobody Talks About This.
The universe spent 13.8 billion years setting temperature records. We broke both of them.
There is a fact about humanity that almost nobody knows, and it is one of the most extraordinary facts I have ever encountered in research.
Right now, today, humans hold the record for the hottest point ever created in the known universe. We also hold the record for the coldest point ever created in the known universe. Not the hottest and coldest on Earth — the hottest and coldest anywhere, in anything, that science has ever measured or confirmed.
The universe is 13.8 billion years old. It contains two trillion galaxies. It has produced quasars, supernovae, neutron star collisions, and the Big Bang itself. And a species that has only had electricity for 150 years, on a small rocky planet orbiting an unremarkable star in the outer arm of one ordinary galaxy, has quietly exceeded the temperature extremes of all of it.
Both records were set within the last fifteen years. Neither made global headlines. Most people reading this article have never heard of either achievement.
Here is the full story of both records — what they are, how they were achieved, and what they reveal about the strange position humanity currently occupies in the cosmos.
I. Understanding Temperature
What heat and cold actually are
Before the records, the physics needs to be clear — because temperature is not what most people think it is.
Temperature is not a substance or a force. It is a measurement of the average kinetic energy of particles — how fast the atoms and molecules in a substance are moving. Hot means particles moving fast. Cold means particles moving slowly. Absolute zero — minus 273.15 degrees Celsius, or 0 Kelvin — is the theoretical point at which all particle motion stops completely. Nothing can be colder than absolute zero because there is no motion left to remove.
At the hot end, there is no theoretical upper limit. Temperature can increase without bound as particles move faster and faster and as energy density in a small space increases. The limits are practical — engineering limits, not physics limits. Which is precisely why human ingenuity has been able to push those limits further than anything nature has managed in the observable universe.
"Cold has a floor — absolute zero, where all motion stops. Heat has no ceiling. The universe can always get hotter. Humans have been taking advantage of that asymmetry for fifteen years without most people noticing."
II. The Hottest Point in the Known Universe
CERN, lead ions, and 5.5 trillion degrees
In 2012, physicists at CERN's Large Hadron Collider in Geneva, Switzerland, set a record that has not been broken since — the highest temperature ever measured anywhere in the known universe.
They did it by accelerating lead ions to 99.9% of the speed of light and smashing them together inside the ALICE detector — A Large Ion Collider Experiment. The collision produced a state of matter called quark-gluon plasma — the same state of matter that existed in the entire universe for the first microseconds after the Big Bang, before protons and neutrons had condensed into existence.
The temperature of that quark-gluon plasma: 5.5 trillion degrees Celsius.
The Guinness World Records officially recognised the ALICE experiment as the holder of the record for the hottest man-made temperature ever created. At 5.5 trillion degrees, this plasma is not just the hottest thing humans have ever made. It is the hottest thing confirmed to exist anywhere in the observable universe today.
Temperature extremes — where CERN sits in the cosmic hierarchy
The important nuance: the quasar 3C 273's accretion disk is modelled to reach approximately 10 trillion degrees — hotter than CERN's measurement. But that figure is a theoretical calculation based on observed radiation, not a direct temperature measurement. CERN's 5.5 trillion degrees is directly measured, making it the highest confirmed temperature in the known universe.
The plasma itself existed for only a fraction of a second before cooling. But in that fraction of a second, physicists recreated the conditions of the universe one millionth of a second after the Big Bang — 13.8 billion years ago — inside a tunnel beneath Switzerland.
"CERN recreated the conditions of the universe one millionth of a second after the Big Bang. The temperature of that moment: 5.5 trillion degrees. The location: a tunnel 100 metres beneath Geneva. The duration: a fraction of a second. The significance: permanent."
III. The Coldest Point in the Known Universe
Bremen, rubidium atoms, and 38 picokelvins
Now the other end of the thermometer.
In 2021, a team of German researchers from the QUANTUS collaboration at the University of Bremen achieved something that should have made global headlines and largely did not: they created the coldest temperature ever recorded anywhere in the known universe.
38 picokelvins. That is 0.000000000038 Kelvin — 38 trillionths of a single degree above absolute zero.
To achieve this, they cooled rubidium atoms to near absolute zero using laser cooling techniques — a process that uses precisely tuned laser beams to slow atomic movement — and then dropped the entire experimental apparatus down a 120-metre free-fall tower. During the brief weightlessness of the drop, they applied magnetic fields to further slow the atoms into a state called a Bose-Einstein Condensate — a strange phase of matter where atoms lose their individual identities and behave as a single quantum entity.
In that state, cooled to 38 picokelvins, the rubidium atoms were moving so slowly that their quantum wave functions became visible at a macroscopic scale — a phenomenon normally observable only at the subatomic level. The team held this temperature for two seconds before the apparatus reached the bottom of the tower.
"38 picokelvins is 38 trillionths of a degree above absolute zero. At this temperature, atoms move so slowly that their quantum wave functions become visible to the naked eye — a phenomenon that normally exists only in the subatomic world."
Cold extremes — where Bremen sits in the cosmic hierarchy
The Boomerang Nebula — located 5,000 light years away in the constellation Centaurus — is the coldest known natural place in the universe at approximately 1 Kelvin. It is a dying star shedding its outer layers and expanding rapidly, and the expansion cools the gas below even the cosmic microwave background temperature of 2.73 Kelvin.
At 38 picokelvins, the Bremen experiment is approximately 26 billion times colder than the Boomerang Nebula. Twenty-six billion times colder than the coldest natural place in the universe. Created in a tower in northern Germany.
IV. The Symmetry
What it means to hold both records simultaneously
Step back and look at what this actually means.
The universe produced its natural temperature extremes over 13.8 billion years through processes of almost incomprehensible scale and violence — the gravitational collapse of stars, the collision of galaxies, the expansion of nebulae across thousands of light years. The hottest natural objects require the mass of millions of suns. The coldest natural place requires the death of a star and the physics of rapid expansion across cosmic distances.
Humans achieved both extremes in laboratories. Using instruments that fit inside buildings. Operated by teams of researchers who go home at the end of the day. On a budget that, while large by human standards, is a rounding error compared to the energy output of a single star.
The gap between what the universe built and what we built is not primarily a gap of scale. It is a gap of precision. Nature achieves extreme temperatures through brute force — enormous mass, enormous energy, enormous time. We achieve them through extraordinary precision — laser beams tuned to specific atomic frequencies, magnetic fields shaped to specific geometries, particle beams accelerated to 99.9% of the speed of light.
"Nature creates extreme temperatures through brute force — the mass of millions of suns, billions of years of time. Humans create them through precision — laser beams, magnetic fields, particle accelerators. We are not stronger than the universe. We are more precise."
We are not stronger than the universe. We will never be. But in the specific domain of temperature — the measurement of how fast matter moves — we have become more precise than any natural process the universe has yet produced. And precision, it turns out, is enough to break the records.
V. What Happens at These Extremes
The physics of the impossible
At 5.5 trillion degrees, matter as we understand it does not exist. Protons and neutrons dissolve. The quarks and gluons that normally constitute them — the fundamental building blocks of all matter — separate into a free-flowing plasma, unconfined by the nuclear forces that bind them under normal conditions. This is the quark-gluon plasma of the early universe — the state of all matter in the first microseconds of existence, before the cosmos cooled enough for particles to form.
Studying quark-gluon plasma tells physicists about the fundamental forces of nature at their most extreme. It reveals how matter itself is structured at the deepest level. It has already produced unexpected discoveries — the plasma behaves more like a perfect liquid than a gas, with almost zero viscosity, a finding that challenged existing theories of quantum chromodynamics.
At 38 picokelvins, matter enters states that have no analogue in everyday experience. The Bose-Einstein Condensate formed at these temperatures is a fifth state of matter — distinct from solid, liquid, gas, and plasma. In this state, atoms lose their individual quantum identities and merge into a single quantum entity. Phenomena that normally exist only at the subatomic scale — quantum tunnelling, wave-particle duality, superposition — become visible at scales the human eye can observe.
Bose-Einstein Condensates are not just scientifically fascinating. They are practically significant. Understanding them has direct applications for quantum computing, precision measurement, and the development of atomic clocks — the most accurate timekeeping devices ever built, which underpin GPS navigation, financial transaction timing, and communications infrastructure worldwide.
"At 38 picokelvins, atoms enter a fifth state of matter where quantum phenomena become visible to the naked eye. Understanding this state has direct applications for quantum computing, GPS, and the most precise clocks ever built."
VI. The Records That Are Coming
How much further can we go?
Both records will eventually be broken. The question is by how much and by whom.
On the hot end, CERN's Large Hadron Collider continues to be upgraded. The High-Luminosity LHC upgrade, scheduled for completion in the late 2020s, will significantly increase collision energy. Future accelerators — including proposed designs that would dwarf the LHC — could push temperatures higher still. There is no theoretical upper limit. The engineering limits will continue to be pushed as long as the physics justifies the investment.
On the cold end, the race toward absolute zero has no finish line — absolute zero itself is unreachable by the laws of thermodynamics. But the approach continues to get closer. Techniques refined from the Bremen experiment are being applied in microgravity environments — aboard the International Space Station, where the absence of gravity allows even longer periods of near-absolute-zero conditions than a free-fall tower. The Cold Atom Laboratory aboard the ISS has produced temperatures approaching 100 picokelvins in sustained conditions that ground-based experiments cannot match.
Every record broken is a new platform from which to reach further. The pattern is consistent and shows no sign of slowing.
VII. The Quietly Extraordinary Species
A final thought
I started researching this article because the symmetry struck me as too remarkable to leave unexplored. The hottest point in the known universe and the coldest point in the known universe, both created by the same species, within fifteen years of each other, in buildings on the same small planet.
There is something in that symmetry that feels like it should be more widely known. We talk constantly about the things humanity has broken — the atmosphere, the climate, the ecosystems, the political systems. We talk less about the things humanity has built and discovered and achieved that the rest of the universe, in 13.8 billion years of existence, has not managed to replicate.
The universe is vast and ancient and indifferent. It has produced things of unimaginable scale and violence and beauty. And on one ordinary Tuesday in Geneva, and on another ordinary Tuesday in Bremen, small groups of researchers quietly exceeded the temperature extremes of all of it.
They went home afterward. They wrote their papers. The records were officially recognised. And most of the world kept scrolling.
But the records stand. Both of them. Held by us.
The universe spent 13.8 billion years setting temperature records. We broke both of them. And the best thing about time is it changes — which means both records will eventually fall again, broken by the same species that set them, pushing further in both directions than we can currently imagine.
That is not a small thing to be.
"The universe spent 13.8 billion years setting temperature records. We broke both of them. And most of the world kept scrolling."
— END —
Mystic Quill | Research & Writing by Selva Ganesh K | 2026
mysticquill.blogspot.com
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