Scientists calculated that the world will end on Friday, November 13, 2026

Why the equation looked compelling

It is worth stating plainly why this particular prediction has legs, because it is not crankery dressed up as science. It is real science, read too literally. The core observation the authors made was genuine and, at the time, provocative: human population had not merely been growing, it had been growing faster than exponentially. The growth rate itself was accelerating. Plotted the right way, two thousand years of population history bent upward along a curve that fit the data remarkably closely.

A model that reproduces the past that well exerts a powerful pull. If an equation can trace population from the Roman era through the medieval world to the mid-twentieth century and stay close to the record the whole way, it feels earned to trust it a few decades further. And the curve did capture something real about the era in which it was written. The post-war decades were a period of genuinely explosive, accelerating human increase, the demographic backdrop to the “population bomb” anxieties of the 1960s and 1970s. For a reader in 1960, the equation was not describing a fantasy; it was describing the trend they were living through, and extrapolating it with more mathematical honesty than most doomsayers bothered with. The date it spat out was precise, testable, and unsettling. All of that is why the claim endures.

The divergence is the tell

The problem sits inside the math itself. The curve the authors chose was a hyperbolic one, of the form where the population is proportional to one divided by the distance to a fixed date. A curve of that kind does not gently approach a large number; it is required to reach infinity at a specific finite time, by construction. Feed it the data and the only thing left to solve for is which date. The “doomsday” was therefore never a discovery in the data. It was a property of the equation, guaranteed before a single population figure was entered. Choosing that functional form is choosing to have a blow-up date somewhere; the fit just fixes where.

And an infinite population is not a physical event. No finite planet can hold infinitely many people, so the divergence is the model announcing its own breakdown, not a prediction that anything happens on November 13, 2026. Contemporary demographers made exactly this objection in Science within a year or two of publication: a curve that requires infinity cannot be a literal forecast of anything real.

The empirical turn came right on cue. Around 1968, the world population growth rate peaked at roughly 2.1% per year and then began a long, steady decline, falling below 1% by the 2020s. That is the single most important fact for this case: the runaway, ever-accelerating growth the equation demanded did not continue. It reversed. Real population growth is now slowing, following the S-shaped path of the demographic transition rather than racing toward a wall. United Nations projections expect world population to keep rising more gently, level off, and most likely peak this century near ten billion before declining. A curve that was supposed to be approaching infinity in 2026 has, in the real world, already turned the other way, and did so more than half a century ago.

Why the date refuses to die

If the equation was falsified by 1968 and the paper was half a joke to begin with, why is anyone still talking about 2026? The answer has little to do with demography and a lot to do with the shape of a good scare. The prediction has every feature that makes a doomsday claim travel: an authoritative source (a physicist in Science), an uncanny fit to the past, and, above all, a single, exact, falsifiable date. Vague prophecies fade; a countdown to a named Friday is shareable in a way that “sometime this century” never will be.

The date also comes pre-loaded with atmosphere. November 13, 2026 falls on a Friday the 13th, a day already draped in superstition, which hands the old paper a recurring hook: whenever attention drifts to the ominous calendar date, the fifty-year-old equation gets rediscovered and passed around as though it were breaking news. Each new audience meets the alarming headline first and the caveats, if ever, second. The mechanism is familiar from other dated doomsdays, from the 2012 Maya scare to the Y2K panic: take a fixed date, attach a catastrophe, let a countdown do the sharing.

Fittingly, the people best equipped to explain the equation are planning to mark the day, not fear it. The Complexity Science Hub in Vienna is holding a “Doomsday Conference” on November 13, 2026, devoted to the sense and nonsense of end-of-the-world predictions. It is hard to imagine a cleaner verdict on the original paper than a room full of scientists using its “doomsday” as an occasion to study why such forecasts keep failing.