Once, as a young adult in the city, I was walking home after a long day of work. The main street leading to my place wasn’t well lit, with dark stretches between streetlamps. There was a huddle of men under one, some standing around, some lounging against the post. They moved in the orange light, turning as one to face me. Something shifted in the air. 

An earlier version of me would have been slower to respond, given them the benefit of the doubt. But after a recent knife-point mugging, I had begun to develop a sort of second skin—a keen, physical sense of danger. I slipped back into the shadows and ran in and out of alleyways. I doubled back, cut across fences, and scaled half walls. I made no sound at all; I made it home. I had made a spiraling maze in real time. They could not find me.

In his essay “From the Tree to the Labyrinth,” Umberto Eco, a lover of labyrinths, explores how we “create and organize knowledge.” Moving away from the restrictive “tree” model, Eco approaches the “labyrinth” model, listing three kinds—a unicursal labyrinth, with only one path to the center and back; a multicursal maze, with many paths, all but one leading to dead ends; and an infinite network of interlinked points, which he calls by the borrowed term “rhizome.”

There are many labyrinths and mazes woven into my memory—verbal, textual, graphical, physical, metaphorical. Tamil kolams, for instance: My mother draws small, perfect threshold patterns at home, and immense, geometrically flawless labyrinths and mazes for events—no outlines, no tools, just her seeing eye and moving hand. When the sky is still dark, she dips folded muslin in wet, ground rice and draws liquid lines on the clean floor. She must draw each bit before the white dries on her hand, which it does almost instantly. Nothing can be erased or redrawn. She must keep moving until the whole kolam is done—the body walking the labyrinth even as it summons it out of nothing, the labyrinth making the world even as it is devoured by little black ants.

Eco’s rhizome model, to its credit, says we may never know everything, but we can keep going. Jorge Luis Borges certainly did, over and over like a modern-day Scheherazade. He wrote The Garden of Forking Paths, The Library of Babel, Funes the Memorious, The House of Asterion, and more, for those of us that love our awful infinities rendered in chewy, fictional ways. 

It’s been so long since the mugging and the maze. Those events (and others like them) ingrained hard habits into me. Unless I’m absolutely certain about the safety of the time and the place, I don’t listen to music as I walk. I wear barefoot shoes. I wear my bag cross-body, coax my hands out of my pockets. I note the exits and sit like a mob boss, the door never to my back. But I myself am softer, and I understand the ways of wayfinding a little better now.

Be Amazed (James McConnachie, Aeon, October 2017)

Abhimanyu, warrior prince, has broken into the Cakravyūha, the battle formation of the colossal whirling disc. While still in his mother’s womb, he had overheard his father, the great warrior Arjuna, discuss war strategy with his uncle Kṛṣṇa, and filed the knowledge away in his preternaturally precocious mind. Now the Kurukṣetra War is upon them, and 16-year-old Abhimanyu has found his way to the center of the moving labyrinth. He is a trained warrior, no doubt, but he is alone, fighting seasoned Kaurava generals on all fronts. They have trapped him away from his fellow Pāṇḍavas. They have sunk his chariot, killed his horses, and broken his sword and bow. Abhimanyu raises a chariot wheel above his head. He doesn’t know how to come out. He never heard the end of the conversation.

This heartbreaking story from the Sanskrit epic The Mahābhārata was likely my own mythical introduction to the labyrinth. McConnachie, too, starts with a myth—a Greek mythopoeic myth—but first he runs a little labyrinth on the morning of his own wedding. His essay for Aeon moves lucidly through history, architecture, religion, folklore, games, psychoanalysis, New Age rituals, and more. 

P.S.: Don’t worry about Ariadne; she gets to chill with Dionysus. Theseus’s dad, not so great.

Instinctively, we sense that mazes and labyrinths are essentially metaphorical—even if it is not always clear what they represent—which explains why it’s so common to seek the meaning of the maze in myth. According to the ancient Greek story, as retold by the Roman writers Plutarch and Ovid, Minos of Crete demanded a tribute from the city of Athens in the form of seven young men and seven women. They would be imprisoned inside the Labyrinth created by Minos’ brilliant architect Daedalus, and there sacrificed to the Minotaur, a monstrous creature born of the unnatural union between Minos’ wife and a white bull.

The brave and ambitious Theseus gets himself chosen among the Athenians and, on arrival in Crete, seduces Minos’ daughter, Ariadne. She secretly arms him and slips him a “clew” of thread. (This is the old word for a ball or skein of yarn and is, fascinatingly, the origin of the English word “clue.”) Theseus kills the Minotaur, escapes the Labyrinth, runs off with Ariadne, and should return home happily—except that he abandons Ariadne on the island of Naxos and then, upon homecoming, forgets to change the color of the sails on his ship as he promised his father he would do if he survived. On seeing the black canvas, the old man drowns himself in the sea.

How the World’s Foremost Maze-maker Leads People Astray (Nicola Twilley, The New Yorker, November 2021)

Adrian Fisher has over 700 mazes across 42 countries to his name, “including one on a skyscraper in Dubai and another that’s now reproduced on Britain’s five-pound note.” He’s also likely the only person to make a successful business out of mazemaking. Twilley profiles Fisher comprehensively, and not a little warily.

Starting with the design of the medieval Christian labyrinth, the most famous of which is in the Chartres Cathedral, France, Fisher slowly included other complex features. “Fisher realized that if he wanted to make mazes he first had to make people want mazes,” Twilley writes. According to Oskar van Deventer, an engineer and creator of renowned mechanical puzzles, he’s the “world’s best maze psychologist,” using what he knows about how people behave “against the unsuspecting solver and even against the suspecting solver.”

In 1980, Fisher was twenty-eight years-old and working for I.T.T., a multinational manufacturing company, where he was responsible for productivity enhancement. He was increasingly drawn to the idea of designing mazes; he’d even formed a company, Minotaur Designs, with a wealthy labyrinthologist and former diplomat, Randoll Coate. But public commissions proved elusive. “At first, I thought it was impossible,” Fisher said. “How do you start? How do you do it?”

Runcie’s dream gave him an idea: Fisher wrote to the letters page of the London Times, briefly outlining the maze’s long history as a Christian symbol and noting that, as in the Archbishop’s dream, a maze’s goal is typically reached not by “pressing toward the center” but, rather, by “returning almost to the edge,” in order to find the proper path. In his signature, Fisher styled himself a “Maze Consultant,” and, before long, this stealth marketing had reeled in a customer, and Minotaur’s first public commission. 

How Brainless Slime Molds Redefine Intelligence (Ferris Jabr, Nature/Scientific American, November 2012)

What can live without a brain or a nervous system, eat better than you, navigate mazes, and win scientists not one, but two Ig Nobel Prizes? The answer is a single-celled organism called the slime mold, also affectionately known as the blob. 

In the 2000s, Toshiyuki Nakagaki, a scientist at Hokkaido University, scattered bits of a single Physarum polycephalum in a maze, a few dots in a petri dish. The bits grew enough to find each other, and then grew some more to fill the maze. The mold then retracted itself from the dead ends, restricting itself to the most rewarding path—and this was the least it could do. Using its ability to grow up to a meter; its ability to analyze, solve problems, and optimize in real time; and its own slime as “externalized spatial memory,” it “effectively re-created Tokyo’s railway network in miniature as well as the highways of Canada, the U.K., and Spain.”

Catch a glimpse of this incredibly cool mold in action in this WIRED video: Mycologist Explains How a Slime Mold Can Solve Mazes. Looks like Nakagaki will have the last laugh, after all. And if you’ve ever wondered how other animals are so much better at this stuff than us, read Kathryn Schulz’s essay for The New Yorker, “Why Animals Don’t Get Lost.”

Gardeners sometimes encounter them in their backyards—spongy yellow masses squatting in the dirt or slowly swallowing wood chips. Hikers often spot them clinging to the sides of rotting logs like spilled bowls of extra cheesy macaroni. In Mexico some people reportedly scrape their tender bodies from trees and rocks and scramble them like eggs. They are slime molds: gelatinous amoebae that have little to do with the kinds of fungal mold that ruin sourdough and pumpernickel. Biologists currently classify slime molds as protists, a taxonomic group reserved for “everything we don’t really understand,” says Chris Reid of the University of Sydney.

Something scientists have come to understand is that slime molds are much smarter than they look. One species in particular, the SpongeBob SquarePants-yellow Physarum polycephalum, can solve mazes, mimic the layout of man-made transportation networks and choose the healthiest food from a diverse menu—and all this without a brain or nervous system. “Slime molds are redefining what you need to have to qualify as intelligent,” Reid says.

Haunted Mazes (Joe Milutis, Cabinet, Winter 2007-8)

I had some trouble choosing a quote from this retro maze of an essay. Every passage seemed appealingly contrarian, sometimes even to the essay’s own points, every idea poised for intertextual sparring with the other pieces in this reading list (something I secretly enjoy). 

Yes, it is gleefully haunted by its own ideas going back and forth and switching back upon themselves, and yes, it will make you question a few axiomatic notions about labyrinths and mazes. But maybe because times have changed, maybe because no one seems to be saying labyrinths are better than mazes or vice versa any longer, some of the arguments may seem a little heavy-handed. 

But some, like this one seemingly drawing from Freud/Jung psychological arcana, still sparkle: “The maze is the labyrinth’s uncanny.”

It seems to me that hidden behind contemporary etymological distinctions is an attempt to tame multicursality, by way of denigrating multicursal mazes as merely “childish” versions of more sober, unicursal ones. Multicursality challenges meditative clarity with multiple versions, no clear centers, and a sense of ambivalence and confusion. These complications, however, are the point of the labyrinth. Even if we grant that labyrinth merely designates the one-path New Age labyrinth recycled from the medieval era, the object is still haunted by a misrecognition. For even the medievals retained a sense of the unicursal labyrinth’s ambages—the equivocation at the heart of its windings, which the New Age version does not readily admit. Additionally, the labyrinth that is the legacy of the medieval period is enmeshed in a circuit of analogies to such a degree that it is impossible to map out all its symbolic equivalences and their implications without ending up in the muck of indistinction. This tendency of the labyrinth to connote so much is part of what makes it an antithesis to sureness, rationality, and clarity. Its structure is mystically congruent with the idea of a dark or enchanted forest; it is also a stand-in for earthly conundrum, brain fold, uterine canal, spiritual struggle, or psychosexual journey. Its center: Mary, the alchemical rose, Jerusalem, princess, Minotaur, inner-self, lotus blossom. And of course there are the various rewards that the multicursal maze holds out for its young adepts (pots of gold, pies and cakes, utopian wonderlands of bunnies and lollipops). Labyrinthine confusion is not merely an issue of its tortuous corridors, its solution not merely the cheese in the corner. Labyrinth enfolds into labyrinth across times, cultures, and myths.

“Backrooms” Gets Lost in Its Own Labyrinth (Adam Nayman, The Ringer, May 2026)

It’s the yellow that first holds you down, like the yellow fog in T. S. Eliot’s The Love Song of J. Alfred Prufrock, like the yellow wallpaper in Charlotte Perkins Gilman’s story of the same name. There’s something about this sickly yellow, but there’s more.

Backrooms is young YouTuber Kane Parsons’s widely acclaimed horror debut. Failed architect Clark manages a strip-mall furniture store called Cap’n Clark’s Ottoman Empire. During his insomniac wanderings, he stumbles upon a doorway in the store’s basement—the entry to the mysterious Backrooms. (The trailer is a relatively safe place to start before you attempt full liminal dread.) 

Nayman’s critical voice stands a little apart from what seems to be near-universal approbation for the film, which he says “exists in its own liminal space between ambitious experiment and fascinating failure.” But he sounds, I must say, somewhat like a parent speaking of his gifted kid—one who could go very far if only he applied himself a little more. What if the kid knows something that others don’t?

[O]ne of the lurking, not so elusive themes of Backrooms—a movie that doesn’t lack for entry points—is the postmodern terror of reiteration without end, the unsettling and melancholy notion of reality as a series of adjoining, subterranean echo chambers, each a slightly altered copy of the last. “Six hundred million square miles of randomly segmented back rooms,” read the original, anonymous, and extremely viral 4chan post that ended up being used as a blueprint by hordes of online architects eager to build their own additions onto a freestanding urban legend; the sprawling, relentlessly subdivisional logic of this online lore, and the fact that anyone could contribute to it at any time, turned the expanse of the Backrooms into a pretty nifty allegory for itself. 

Parsons was 16—and going by the online handle Kane Pixels—when he made his first Backrooms short in 2022: a found-footage-style clip created in Blender and After Effects. His innovation was to place the preexisting images into a paranoid narrative framework about a research facility offering egress to another dimension; the first clip centered on an amateur filmmaker who gets lost in the Async complex and chased by an unseen creature. 

The Far North of Experience (Rebecca Solnit, Guernica, June 2013)

Solnit describes one summer she spent on an Icelandic peninsula, “in the company of strangers and birds.” 

“Creation is always in the dark because you can only do the work of making by not quite knowing what you’re doing, by walking into darkness, not staying in the light. Ideas emerge from edges and shadows to arrive in the light, and though that’s where they may be seen by others, that’s not where they’re born,” she says, and goes to the last dark place she could find that summer—a labyrinth called the Path, lit by the faintest lavender-blue light.

Lyrical and more atmospheric than her engaged treatment of labyrinths in Wanderlust: A History of Walking, this essay shows us a gentle way of being we would do well to heed.

A labyrinth is an ancient device that compresses a journey into a small space, winds up a path like thread on a spool. It contains beginning, confusion, perseverance, arrival, and return. There at last the metaphysical journey of your life and your actual movements are one and the same. You may wander, may learn that in order to get to your destination you must turn away from it, become lost, spin about, and then only after the way has become overwhelming and absorbing, arrive, having gone the great journey without having gone far on the ground.

In this it is the opposite of a maze, which has not one convoluted way but many ways and often no center, so that wandering has no cease or at least no definitive conclusion. A maze is a conversation; a labyrinth is an incantation or perhaps a prayer. In a labyrinth you’re lost in that you don’t know the twists and turns, but if you follow them you get there; and then you reverse your course.

The end of the journey through the labyrinth is not at the center, as is commonly supposed, but back at the threshold again: the beginning is also the real end. That is the home to which you return from the pilgrimage, the adventure. The unpraised edges and margins matter too, because it’s not ultimately a journey of immersion but emergence.

Labyrinth (Amelia Gray, The New Yorker, February 2015)

Dale, reader of “Hellenic myth” and all-round good sport, has organized the Pumpkin Jamboree. It’s a way for the townspeople to have some weekend fun while raising money for the local fire department. Its highlight is always the corn maze. “Only it isn’t a maze this time,” Dale says, “It’s a labyrinth.” 

This unexpected turn of events thins the crowd, but it looks like Jim, his friend, might be willing to give it a go. “Now, you go on, Jim. This is my life’s effort distilled. Find out what it’s all about.”

It’s not easy to take a well-worn, spoiler-free myth known since Plutarch and make it sound fresh. Gray has done that here in her short story without a wasted word, and her Daedalus, cornfield architect, is just getting started.

Dale watched them leave, fingering a pumpkin’s thick stem and surely considering his hours of lost work. He starts his mazes a few months beforehand, cutting into the young corn when it’s tall but not yet sprouted, taking a pass first with the tractor and then with the riding mower to pull out the brace roots and tamp the corn down. He draws the maze plans on drafting paper and displays them afterward in his swept-out garage addition—he calls it the Hall of History—with other jamboree memorabilia: the gearshift from the original hayride truck, trotter prints from the winning pigs. We gather around to reminisce about which wrong turn we took and what was waiting for us on the other side.

Knowing what he must have put into it, I thought it was a shame to stand by and see everyone go. The sun was still low in the sky, and it was lonely at home, where the TV had been broken for a week, and the tap water had begun to taste oddly of blood. “I’ll go first,” I said. “I’ll do it.”

Kanya Kanchana is a writer from India.

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Editor: Krista Stevens
Copyeditor: Carolyn Wells

In 1792 Paris, a “north-going astronomer,” Jean-Baptiste-Joseph Delambre, set forth for Dunkerque, France, while a “south-going astronomer,” Pierre-François-André Méchain, made his way to Barcelona, Spain. As leaders of the meridian expedition, their modest ambition was to measure the world. They would use a new measure to be called the meter. “The meter would be eternal because it had been taken from the earth, which was itself eternal. And the meter would belong equally to all the people of the world, just as the earth belonged equally to them all.” 

If a nonfiction book opens with a map and a list of dramatis personae, make some coffee and settle in. Such is the case with historian Ken Alder’s The Measure of All Things: The Seven-Year Odyssey and Hidden Error that Transformed the World—the story of the birth of the metric system amid the ferment of the French Revolution. It’s a thriller.

We start with our bodies, measuring height and weight and life. We want to know what health is, what beauty and pain and performance look like. We weigh our brains for intelligence, ability, sickness, happiness. We fight about race and politics, sex and money, images and words. We stalk the planet, its history and geography, biology and chemistry. We wrestle with space-time, its mathematics and paradoxes. We have no idea what to do about consciousness. And then there’s the small matter of love. We are obsessed and we cannot stop. 

At its heart, measurement is a utopian undertaking, one that aims to make perfect sense of the world. But at every turn, it runs up against the real world, and every so often, our understanding of reality itself. We know that the act of measuring changes what is measured. Might it be changing us measurers, too? 

Welcome to a reading list about measurement—not only as techne, art or craft, but as episteme, knowledge, its conquests and collapses, and what it really gives and takes away.

Medical Benchmarks and the Myth of the Universal Patient (Manvir Singh, The New Yorker, March 2025)

Indian kids tended to be small, curious, energetic as babies, growing up lean, active, rudely healthy. (I use the past tense because I’m not sure whether this is as true now as it was when I was little.) And yet, our parents thought us skinny and tried to feed us all the time. Was that a normal parental thing for the times, and if not, where did they get the idea that something needed to be fixed?

Universal standards have a way of making us feel competent and good, like, get your blood pressure down to 120/80 and you’ll be all right. But as Singh, a Harvard-trained anthropologist, points out: “Pretending that differences don’t exist doesn’t make them disappear; it only drives practitioners to rely on flawed intuitions.” 

Citing case after case of medical benchmarks—too little, too much, too sideways—across the world, Singh calls for a system altogether more nuanced and considerate than the current “myth of the universal patient”—something that won’t cause actual harm, something that will help us see the real humans behind the data.

When my daughter was ten-and-a-half months old, she qualified as “wasted,” which unicef describes as “the most immediate, visible and life-threatening form of malnutrition.” My wife and I had been trying hard to keep her weight up, and the classification felt like a pronouncement of failure. Her birth weight had been on the lower end of the scale but nothing alarming: six pounds, two ounces. She appeared as a dot on a chart in which colored curves traced optimal growth; fifteenth percentile, we were told. She took well to breast-feeding and, within a month, had jumped to the twentieth percentile, then to the twenty-sixth. We proudly anticipated that her numbers would steadily climb. Then she fell behind again. At four months, she was in the twelfth percentile. At nine-and-a-half, she was below the fifth.

Our pediatrician was worried. Ease off the lentils and vegetable smoothies, we were warned; we needed to get more calories into our babe. Ghee, peanut butter—we were to drench her food in these and other fats and wash them down with breast milk and formula. And that’s what we did. When we came back a month later, though, we learned that she had dropped further—and crossed into “wasted” territory.

The Broad, Ragged Cut (Elizabeth Svoboda, Aeon, December 2018)

Have you ever taken an IQ test? How about an aptitude test for studies or a psychometric test for work? How about an online quiz?

“You were supposed to be there already. Didn’t the tests show you had a head start?” Svoboda, labelled a “gifted” child in the ’80s and dealing with its fallout in her adult life, unpacks the deeply problematic, yet starry, history of testing. She looks at Stanford-Binet, Army Alpha, SAT, and others—all ways to measure human potential. Intelligence and aptitude tests, “binary stars circling in the same orbit,” Svoboda says, seem to be asking and answering: Who deserves a chance, and who doesn’t? Who is worthy, and who isn’t? 

For the American psychologist Lewis Terman, who devised the Stanford-Binet IQ test, the birth of a gifted child was like the birth of a star. In the name of illuminating what he saw as a void, Terman sought out the stars that burned brightest. “The school has no more important task than to foster the development of the mentally gifted,” the researcher at Stanford University in California told attendees at a meeting in San Francisco. “Our chances of survival . . . may well depend upon the discovery and utilisation of highly superior abilities of every kind.” To further this mission, Terman urged hundreds of children all over California to sit for his newly developed intelligence test in the 1920s. Intending to prove his theory that high IQs predicted life success, he sorted the highest scorers into a group of 1,521 children (called his “Termites”) that he would follow and document throughout their lives.

Fracking Eyeballs (D. Graham Burnett, Asterisk, October 2023)

In hydraulics, pumping high-pressure fluid into a well causes rock to crack and oil and gas to come pouring in. This is called fracturing, or fracking. Burnett, a Princeton historian of science and part of a scholar-artist-activist collective called Friends of Attention, has adapted this term to refer to an insidious property of the attention economy. “Fracking eyeballs” refers to applying psychological and advertising techniques under pressure to bait and extract monetary value from human attention. (I don’t know how they live with this mental image all the time, though.) 

This essay, opening at a 1925 Harlem shop window with a “puzzling totem face” and crammed with historical anecdote and detail, comes from the magazine’s Issue 04: Measurement. Do check out the whole  issue: “How do you measure seeing god? Does testing vaccines need to take so long? Outlining poverty. Asking better questions. The origins of the ad economy. Can we really say how smart AIs are? Domestic violence during lockdown. Sex, drugs, and colonoscopies. Our most pedantic issue yet.”

See also Burnett’s Public Domain Review essay, “Cybernetic Attention,” where he pursues the “pre-history of the laboratory research that has relentlessly worked to slice and dice the attentional powers of human beings.”

In Nixon’s earliest experiments, he would hide in an observation booth, accompanied by a metronome beating half seconds, and then watch closely as two ads were revealed to a seated subject. Ticking his pencil along the rungs of a fascinating little ladder-pad with each beat of the metronome (marking the left side when the eyes were to the left; marking the right side when the eyes were to the right), Nixon created a graphical record of the subject’s visual encounter with the two stimuli. 

If you were advertising a car, was it better to show a picture of a car, or of a pretty woman? If one was selling shirt collars, was it better to do so under the headline “Murder!” or the headline “Quality Shirt Collars”? To make a long story short (and to skip over the proto-pataphysical techniques by which Nixon established what we might call a “science of irrelevancy”), Nixon found that “irrelevant illustrations do attract more attention and hold interest longer than do relevant ones.” Which is to say: systematically doing violence to sense raised revenue. This could be proven in his laboratory. Would it be wrong to say that we live, in many respects, in the world evolved from that finding? 

The Anthropometric Detective and His Racial Clues (Ava Kofman, The Public Domain Review, February 2016)

In 1901, Scotland Yard started using fingerprints to solve crime. They weren’t the pioneers. Sherlock Holmes had gotten there first in The Sign of Four, already examining under his magnifying glass, in 1890, what appeared to Dr. Watson as “mere shapeless smudges of dust.” While the fictional Holmes was publishing his fictional monographs in fictional journals, “gentleman scientist” (self-funded and without institutional affiliations) Francis Galton was working on the same thing for real. The era was primed for this kind of work across disciplines and professions—finding and interpreting “clues unnoticed by others.”

And while Holmes was trying to catch bad guys, Galton came up with a malign plan. What if you could use fingerprints as “tiny fossil records, providing evidence of the genealogy, personality, criminality, and perhaps even destiny of individuals and groups”? No more varicolored bad guys, only “a political program of selective breeding to improve, in his view, the human race.” 

Empire, race, and “science”—eugenics.

In 1888, a reporter from the Pall Mall Gazette paid a visit to Galton’s Anthropometric Laboratory in London, where instruments developed by Galton measured the physical and mental characteristics—from keenness of hearing to breathing power—of over 10,000 people. The resulting article, titled “A Morning With the Anthropometric Detectives,” described Galton’s laboratory as a world of “order and precision, and tests of the nicest accuracy.” “Dumb though they are,” Galton told the reporter, “what splendid detectives our instruments might prove.” “Splendid detectives!” the reporter exclaimed, “I am not, I hope, in a department of the Criminal Investigation Department, unconsciously yielding convincing proofs of personal identity with some scoundrel hitherto unhung.”

The comparison to detection in the article’s title is no accident: the scientific development of medical and anthropometric instruments like Galton’s coincided with the rise of the detective novel, a genre which, in the words of the literary scholar Ronald Thomas, was “preoccupied with the professional monitoring and identification of bodies.” Fears of mistaken identity and unconscious slips were crystallized in the literature of detection but emerged from a broad range of hermeneutic practices across the era, at a time in which those in power considered the borders of empire and boundaries of racial identity to be insecure.

John Wheeler Saw the Tear in Reality (Amanda Gefter, Quanta Magazine, September 2024)

“What happens when you get to the end of things?” This was the question that had held John Wheeler in thrall all his life. A student of Niels Bohr and friend of Albert Einstein who counted Richard Feynman among his own students, Wheeler was a rare soul—a below-the-radar legend, a “physicist’s physicist” who really wanted physics for the people. And throughout his storied career, he kept journals. 

We learned in school that gravity is a force that pulls objects together. 

Einstein’s theory of general relativity came along and said, well, it’s actually that matter and energy can curve space-time, and that curving is gravity. Wheeler wondered, what if gravity could act on itself, endlessly contorting space-time, and that was what matter itself was . . . warped space-time? But reality had a problem. “The fabric of space-time, at its smallest scales, was loosely woven, chewed by moths, too flimsy to bear the weight of the world. Yet here is the universe. It must be made of something.” What?

A clue: At the end of Alder’s meter book, he quotes Protagoras, a pre-Socratic philosopher: “Man is the measure of all things.”

It dawned on Wheeler that when space and time went, taking the rest of physics with them, there was something left. “With law going and chaos arriving, one principle remains,” Wheeler wrote. “The quantum principle.” Quantum mechanics, he wrote, “destroys the concept of the world as ‘sitting out there,’ with the observer safely separated from it by a 20 centimeter slab of plate glass. Even to observe so miniscule an object as an electron, he must shatter the glass. He must reach in. . . . The universe will never afterwards be the same. To describe what has happened, one has to cross out that old word ‘observer’ and put in its place the new word ‘participator.’ In some strange sense the universe is a participatory universe.”

It was officially the wildest idea he’d had yet. A universe made not of matter, not of space-time, not of stuff at all, but of our choices. It wasn’t what he’d hoped to find; the physics had led him there. He’d pried up space-time, peered beneath, and found himself staring, to his bewilderment, at a mirror. “One finds himself in desperation asking if the structure, rather than terminating in some smallest object or in some most basic field, or going on and on, does not lead back in the end to the observer.”

The Mythology of Conscious AI (Anil Seth, Noēma, January 2026)

Decades ago, the philosopher David Chalmers came up with a distinction that has since become a popular touchstone in consciousness circles—the easy problem vs. the hard problem. The “easy problem” deals with the physical brain and how its functions and processes create perception, cognition, behavior, etc. The “hard problem” is why such phenomena should be connected to internal, subjective consciousness in the first place. This “explanatory gap” takes a scientific problem into the realm of philosophy. In the sidenote essay, Seth sidesteps the hard problem for what he calls the “real problem”—accounting for “the properties of consciousness in terms of biological mechanisms.” Measuring consciousness, in effect.

In the 10 years that separate the two essays, much has happened, the main event being the astonishing evolution of artificial intelligence. And now we have an unreal problem. In this Berggruen Prize-winning essay, the neuroscientist discusses the possibility of consciousness in AI. But as he says: “The future history of AI is not yet written.”

Intelligence and consciousness are different things. Intelligence is mainly about doing: solving a crossword puzzle, assembling some furniture, navigating a tricky family situation, walking to the shop—all involve intelligent behavior of some kind. A useful general definition of intelligence is the ability to achieve complex goals by flexible means. There are many other definitions out there, but they all emphasize the functional capacities of a system: the ability to transform inputs into outputs, to get things done. 

Consciousness, in contrast to intelligence, is mostly about being. Half a century ago, the philosopher Thomas Nagel famously offered that “an organism has conscious mental states if and only if there is something it is like to be that organism.” Consciousness is the difference between normal wakefulness and the oblivion of deep general anesthesia. It is the experiential aspect of brain function and especially of perception: the colors, shapes, tastes, emotions, thoughts and more, that give our lives texture and meaning. The blueness of the sky on a clear day. The bitter tang and headrush of your first coffee.

Exhalation (Ted Chiang, Lightspeed, April 2014)

Chiang points to two sources of inspiration in his story note: “The Electric Ant,” a Philip K. Dick story in which a man visits a doctor, only to be told that he’s a robot, and proceeds to open himself up to look at his own inner workings, and The Emperor’s New Mind, a book by mathematician Roger Penrose, in which a chapter discusses the concept of entropy. He’s struck by Penrose’s notion that we’re “consuming order and generating disorder,” and that we, given the laws of thermodynamics, “live by increasing the disorder of the universe.” 

In a young world of mechanical beings where “death is uncommon,” an anatomist performs exquisite auto-dissection—an extreme act of analysis to discover what sustains life and what, therefore, can end it in a “fatal equilibrium.” 

This Hugo and Locus-winning story reminds me, in its ending, of something Ursula K. Le Guin says in The Language of the Night: “Only the individual can get up and go to the window, and draw back the curtains, and look out into the dark. Sometimes it takes considerable courage to do that. When you open curtains you don’t know what may be out there in the night. Maybe starlight; maybe dragons; maybe the secret police. Maybe the grace of God; maybe the horror of death. They’re all there. For all of us.”

At first the other anatomists did not believe me when I told them what I had discovered, but in the months that followed my initial auto-dissection, more and more of them became convinced. More examinations of people’s brains were performed, more measurements of atmospheric pressure were taken, and the results were all found to confirm my claims. The background air pressure of our universe was indeed increasing, and slowing our thoughts as a result.

There was widespread panic in the days after the truth first became widely known, as people contemplated for the first time the idea that death was inevitable. Many called for the strict curtailment of activities in order to minimize the thickening of our atmosphere; accusations of wasted air escalated into furious brawls and, in some districts, deaths. It was the shame of having caused these deaths, together with the reminder that it would be many centuries yet before our atmosphere’s pressure became equal to that of the reservoir underground, that caused the panic to subside. We are not sure precisely how many centuries it will take; additional measurements and calculations are being performed and debated. In the meantime, there is much discussion over how we should spend the time that remains to us.

Kanya Kanchana is a writer from India.

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Editor: Krista Stevens
Copyeditor: Cheri Lucas Rowlands

One of the most vivid memories of my childhood involves an ice cream. My mother and father kept a relatively treat-free house, with desserts reserved for special occasions, but their standards loosened during summer vacations. During a visit with relatives we didn’t see very often, my parents decided to make the day even more special; they gave my sister, my two cousins, and me money to buy something from the ice cream truck that made a regular circuit around the neighborhood. Thrilled by this rare indulgence, I rushed down the sidewalk, delighted to finally take part in this classic summertime ritual, eating dessert in the middle of the afternoon! 

I can still remember the thrill of holding that much-anticipated cone, taking my first lick . . .  then watching the scoop roll off its biscuity throne to the sidewalk. 

Perhaps that is why, as an adult, my freezer is always stocked with at least two flavors of ice cream, which I eat year-round. It’s my go-to way to reward myself after a productive day, or to make a bad one better. While I tend to keep things simple (and have been known to eat directly out of the carton), I love ice cream for its versatility. It can support a piece of apple pie or be the main event in a fudge-slathered sundae. Its near-infinite variety of flavors offers something for everyone, from no-frills vanilla to chef-inspired gastronomic experiments. 

That ability to shape-shift has made this humble dessert a mirror of sorts, reflecting cultural changes. It even goes back to the founding of the country: Thomas Jefferson was the first known American to write down an ice cream recipe (though it’s only fairly recently that historians have begun to acknowledge his problematic relationship with the enslaved workers who produced such delicacies for his guests). A century later, advances in refrigeration transformed ice cream from a luxury good to a mass-market phenomenon. As immigration surged in the US, peddling ice cream on the street became a way for new arrivals to grasp the American dream. During World War II, the dessert symbolized the country’s can-do attitude: Despite the many logistical obstacles, the US government shipped it to troops as far away as the Pacific.

In our current Age of Ozempic, while celebrities get ever slimmer and our screens fill with physical-optimization hacks, desserts may seem like an endangered species. But I believe it’s more important than ever to take guilt-free pleasure in food that brings you joy. And if you still feel a twinge of hesitation before digging into a bowl of your favorite flavor, multiple studies over the past 20 years have shown that ice cream actually has real, measurable health benefits (see David Merritt Johns’s piece from The Atlantic below). No less an authority than Dr. Ezekiel Emanuel, a prominent bioethicist and oncologist, titled his most recent book on healthy living Eat Your Ice Cream. 

So go ahead and have a scoop. Think of it as doctor’s orders. 

How Ice Cream Became the Ultimate American Comfort Food (Matt Siegel, Eater, August 2021)

This entertaining account traces ice cream’s transformation from an expensive luxury to an all-American dish in the early 20th century, when advances in refrigeration made it more widely available. Prohibition played a part, too: When alcohol was banned nationwide in the 1920s and early ’30s, some breweries switched to making ice cream instead, “a decent substitute for alcohol for the drowning of one’s emotions.”

But what really stands out in this story is the role ice cream played in World War II, when it became a symbol of American patriotism. Siegel weaves together historical anecdotes that show the enormous effort the US military put into embedding ice cream throughout its supply lines. Why go through all that trouble? Siegel makes a compelling case that getting ice cream halfway around the world, under such difficult circumstances, was a way of putting American exceptionalism into action. If we can do this for our soldiers, we can do anything. 

By the time World War II came around, ice cream . . . had become inseparable from the American way of life, an emblem of American comfort, freedom, and democracy. The rest of the world went back to banning ice cream as part of its rationing efforts (with Great Britain adding salt to the wound by endorsing carrots on sticks as the official wartime substitute for ice cream bars), but the United States doubled down, building pop-up ice cream factories on the front lines; delivering individual ice cream cartons to foxholes; spending more than a million dollars on a floating ice cream barge that roamed the Pacific delivering ice cream to Allied ships incapable of making their own; and distributing 135 million pounds of dehydrated ice cream base in 1943 alone.

And you’re goddamn right we won the war.

Fifteen Iconic Ice Cream Flavors and How They Were Invented (Vanessa Barron, Tasting Table, October 2025) 

This engaging survey of popular ice cream flavors is filled with trivia-night-worthy fun facts: that vanilla is consistently the best-selling flavor worldwide; that chocolate ice cream may actually have been created first (cocoa being more readily available than vanilla); and that mint chocolate chip got an international popularity boost when a British culinary student created the dessert “Mint Royale” to celebrate the marriage of England’s Princess Anne in 1973. 

But such is the nature of culinary history that not all lineages are straightforward. I appreciate the way Barron analyzes all the possible origin stories, even when they contradict. While some flavors have a single known inventor—such as the Grateful Dead fan who suggested “Cherry Garcia” to the hippie entrepreneurs Ben & Jerry’s—others resulted from experimentation over time. Some even have shameful associations: Butter pecan, for example, became popular in the American South, where the nuts were plentiful and used to dilute vanilla ice cream when serving it to Black customers. 

Rocky Road could be considered the ice cream world’s first mix-in flavor, blending creamy ice cream with crunchy and chewy additions. According to legend, its creation dates back to 1929, when ice cream maker William Dreyer and candy maker Joseph Edy teamed up in Oakland, California. During the Great Depression—a “rocky” time for America—Dreyer supposedly invented the flavor by using his wife’s sewing scissors to cut marshmallows into a chocolate ice cream base studded with walnuts. The duo mass-produced the new flavor, giving the country a bit of sweetness and humor during a bleak decade.

But the name “Rocky Road” may have existed long before. In the mid-1800s in Australia, settlers used the term for a confection of sweets, nuts, and dried fruit; essentially, a proto-trail mix. And just down the road from Dreyer’s and Edy’s, Fentons Creamery also claims to have invented the flavor, swapping walnuts for almonds in their signature version.

The Museum of Ice Cream is a Horrifying Fun House (Brianna Wellen, The Takeout, July 2022) 

Brianna Wellen had one overarching question when she visited the Chicago outpost of The Museum of Ice Cream: What is this place? I had the same thought as Wellen when it started showing up on Google Maps as a must-see attraction in my hometown—is this “an influencer’s paradise? A children’s playground?”

The answer, it turns out, in her snarky-but-fair review, is both. A privately owned chain with five locations in the US and one in Singapore, it started as a pop-up “experience” in New York, with an aggressively pink aesthetic that bridged the line between kids’ party and Instagrammable photo op. If you’re looking for “an anthropological look at the history and cultural impact of ice cream,” she writes, this isn’t it. (Though I’d happily visit that museum.) 

It’s more fun to write a scathing review than a positive one, but Wellen doesn’t take the easy route and go full hater. She acknowledges that the people around her are having fun taking pictures in the giant pool of faux sprinkles, and that the unlimited ice cream samples may be worth the price of admission for some, even if the Chicago hot-dog-style signature treat looks better than it tastes. 

What she points out so effectively is the chasm between the museum’s ethos of lighthearted escapism and its grim reality: It is housed in a building that used to be the headquarters of the prestigious Chicago Tribune newspaper, now given over to an ephemeral, commercial experience dependent on overworked, demoralized employees. 

There’s something extremely dystopian about these bright, colorful, somewhat functionless installations popping up inside closed businesses, which is how the project started. And seeing Chicago’s iteration in the storefront of the now empty Tribune Tower, which once housed some of the most influential journalists the city had to offer, was disappointing, signaling that while the media industry is on its deathbed, people will form a line down the block to snap a photo with a plastic sprinkle.

There was something about the staff’s demeanor that led me to believe they weren’t as excited to be there as their oft-repeated scripted banter made it seem. The logistics of certain experiences seemed like a mess; the large, unending crowds needed to be endlessly wrangled; and the loud music meant that their faux cheerful taglines needed to be screamed right into the ears of visitors to be heard. Smiles were pasted on as impatient guests asked why they couldn’t just go into the Ice Cream Lab already. When Angela and I kindly told one worker that there was no rush in letting us into a particular room and then complimented her ice-cream-themed hair clips, she reacted with such graciousness at our attitudes that I thought she was about to start sobbing.

Nutrition Science’s Most Preposterous Result (David Merritt Johns, The Atlantic, April 2023)

I still remember my visceral reaction on reading this Atlantic story a few years ago: Is ice cream actually good for me? 

In this exhaustively researched and reported piece, Merritt Johns explains how a statistically significant finding can be pushed aside when it doesn’t fit an accepted narrative. For more than 20 years, nutritional studies have shown that diabetics who eat half a cup of ice cream a day have a lower risk of heart problems, and people who eat two or more servings of ice cream a week had a significantly lower risk of developing diabetes in the first place. Yet those findings seemed so contrary to public health advice that alternate explanations kept being pushed instead—it’s just dairy that’s good for you, especially if you choose low-fat milk or yogurt. “As academia’s public-relations machinery came to life,” he writes, “nuance went out the window.”

Poor ice cream never got its due—until now. 

Every day brings another health story about a so-called “superfood,” but Merritt Johns’s relentless focus on the facts sets this one apart. Rather than relying on an academic study or two, he tracks down all the key researchers involved in what I like to call the Great Ice Cream Cover-up: “I wanted to know what happens when consensus makers are confronted with a finding that seems to contradict everything they’ve ever said before.” Some refuse to be interviewed (more proof of a conspiracy?), but most seem relieved to finally admit that seemingly set-in-stone advice about what’s good for us is more malleable than we think. 

In 2004, the English epidemiologist Michael Marmot wrote, “Scientific findings do not fall on blank minds that get made up as a result. Science engages with busy minds that have strong views about how things are and ought to be.” Marmot was writing about how politicians deal with scientific evidence—always concluding that the latest data supported their existing views—but he acknowledged that scientists weren’t so different.

The ice-cream saga shows how this plays out in practice. Many stories can be told about any given scientific inquiry, and choosing one is a messy, value-laden process. A scientist may worry over how their story fits with common sense, and whether they have sufficient evidence to back it up. They may also worry that it poses a threat to public health, or to their credibility. If there’s a lesson to be drawn from the parable of the diet world’s most inconvenient truth, it’s that scientific knowledge is itself a packaged good. The data, whatever they show, are just ingredients.

Eating California’s Most Controversial Ice Cream (Amy Ettinger, Literary Hub, June 2017)

Who thought foie gras ice cream was a good idea? And more importantly—what does it taste like? Amy Ettinger took on these pressing questions with a visit to Humphry Slocombe, a “kid-unfriendly” ice cream shop in San Francisco. Chef and co-owner Jake Godby admits the controversial flavor is only rarely on the menu (it’s too expensive and takes too long to make), but the debate surrounding it has been good for business. Hardcore foodies rush to buy it when they can, while the protests of animal-rights activists only raise the shop’s profile. 

More than a food review, Ettinger explores why people make and eat extreme flavors. She argues that American palates have expanded over the decades; we’ve gotten used to ordering Korean barbecue tacos and sushi burritos, mash-ups unknown (and unthinkable) to our great-grandparents. To grab attention—and prove your chops as an out-of-the-box culinary thinker—you have to raise the stakes: “One person’s gross-out experience seems to be another person’s gleeful experimentation.”

As I took another bite, I couldn’t help but feel a thrill. There was something decadent in eating a treat that so many people would be upset about. The wrath I could incur by simply opening my mouth, chewing, and swallowing made me feel powerful. And maybe that perceived transgression is itself a flavor enhancer, much like artificial coloring can ramp up our experience of “lime” or “banana” in some mass-produced, neon-colored taffy or gum.

Is that why Godby put it on the menu—so he could wield that kind of power? Why continue making food that would anger people? Was it to get attention?

99 Problems: The Ice Cream Truck’s Surprising History (Olivia Potts, Longreads, August 2025)

Who knew the simple ice cream truck had such a dramatic backstory? As an avid collector of historical trivia, I devoured this account of ice cream’s mobile history, starting with 19th-century immigrant street peddlers through controversies over the trucks’ music, cleanliness, and supposed ties to organized crime (the notorious Glasgow Ice Cream Van Wars ended with six people killed in a fire). 

What gives this piece a lovely personal touch is the way Potts weaves this past with her own memories of growing up in an English seaside town, where she and her father would pick up ice cream treats in the summer: “An unspoken secret between us, given that Mum had dinner waiting on the table when we arrived, and would have been appalled to know that a mere seven minutes earlier, we were driving along the seafront, car top down, the salty air whipping my long hair into the ice cream and sticky sauce.”

As she interviews ice cream van owners whose vocation goes back generations—along with the entrepreneurs adapting their vehicles to new technologies—she is struck by how many people in the business are following a family tradition. “It’s an industry that remains strong, with an uncanny ability to adapt to changing times,” she writes. “I am fascinated by its survival.”

While it may be more common now to see an ice cream truck at an event or on TikTok, we still crave those summer days when jaunty chimes call us out to the street. The odds can feel stacked against the old-school icey men, with legislation that limits their movement, environmental and nutritional campaigners who demand more and more restrictions, rising pitch rents, the price of vans, the difference, even, in the way children play outside. But they’re still there, still clinging on. Why?

The Secrets of an Italian Gelato Maker (Erla Zwingle, Craftsmanship, June 2016) 

This portrait of master gelatiere Andrea Soban oozes with admiration for its subject—and had me craving his signature mandarin orange flavor. From his base in Valenza, Italy, halfway between Milan and Torino, he continues a family tradition that goes back at least five generations: creating the most flavorful, creamy gelato free of artificial ingredients or colors. 

The word gelato—Italy’s lower-fat, lower-sugar version of ice cream—literally means “frozen,” but making it at Soban’s level involves science-whiz levels of knowledge. Zwingle shows the intricate steps he takes to get the right balance of ice crystals, fat droplets, and air bubbles. While he sources ingredients from around the world, most of his favorites come from specific parts of Italy; the best pistachios, for example, are grown in one small Sicilian town. 

This story gave me a new appreciation for the effort that goes into making a seemingly simple dessert—when the person making it wants to be the very best, that is. Anyone want to join me on a field trip to Valenza? 

“Try this,” Andrea said, as he handed me a tiny spoonful of a just-made mandarin sorbetto. Sensations of cold, and a smooth wave of extraordinary citrus flavor, blended into a faultless harmony as the whole combination swept up to my brain. It tasted juicier than the juice of the fruit itself. And then it simply disappeared. No loading my tongue with a mass of flavors jostling together, struggling for dominance, leaving assorted clinging aftertastes as my stomach braced itself. It left only the desire for more.

Suddenly I understood the hidden power of fine gelato. It doesn’t aim only for my mouth, and my stomach is really of no interest. It aims for the dopamine reward system lurking in my brain, the part that says, “You don’t need this, but you’ve got to have it.” We did these little teaching-tastings intermittently all morning. I paid close attention to everything he said, but the voice in my head kept crooning incoherently about what was happening in my mouth.

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Elizabeth Blackwell is the author of While Beauty Slept, On a Cold Dark Sea, and Red Mistress. She lives outside Chicago with her family and stacks of books she is absolutely, positively going to read one day. 

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Editor: Carolyn Wells
Copyeditor: Krista Stevens