These unopened scrolls look like dead books, but they're not. They're starting to speak again.
Beneath the ash of Vesuvius, a scroll that has not been touched by human hands in two thousand years has begun to speak again. Researchers using artificial intelligence to interpret X-ray images of the carbonized papyrus PHerc 1667 have recovered twenty columns of stoic philosophical text — likely the words of Chrysippus — without unrolling or damaging the fragile artifact. The achievement is not merely technical: it is a reminder that the past does not disappear, but waits, patient and compressed, for the tools of understanding to arrive.
- A scroll no larger than a fist, charred by volcanic heat and broken by centuries of handling, still held legible words sealed inside it — words no living person had read since antiquity.
- Previous attempts to physically unroll similar scrolls caused them to crumble to dust, making every fragile artifact a gamble between knowledge and destruction.
- AI trained on high-resolution X-ray scans learned to detect microscopic traces of ink on papyrus fibres, reconstructing hidden text layer by layer without a single physical intervention.
- The recovered passages discuss hormē and phronēsis — stoic concepts of impulse and practical wisdom — and suggest the Herculaneum library was far more philosophically diverse than scholars had assumed.
- With the technical barrier largely overcome, the Vesuvius Challenge has pivoted toward the slower, deeper work: hundreds of scrolls still await not just reading, but understanding.
In the buried library of a Roman villa near Pompeii, a scroll has begun to speak again — not through human hands, but through machines trained to see what human sight cannot. Researchers virtually unwrapped PHerc 1667, a papyrus carbonized when Vesuvius erupted in AD 79, recovering twenty columns of text from inside the blackened roll without ever physically opening it. The scroll is barely eight centimetres tall, broken and diminished by time, yet it carries the philosophical arguments of a stoic thinker — most likely Chrysippus — on ethics, impulse, and the governance of the self.
The technique was developed by computer scientist Brent Seales at the University of Kentucky. High-resolution X-ray imaging, paired with machine-learning algorithms, detects subtle variations in papyrus fibres where ink was once applied, reconstructing the text layer by layer. What emerges is not an approximation but a reading — the actual words a scribe set down two millennia ago.
The text engages with core stoic concerns: hormē, the dangerous pull of impulse left ungoverned by reason, and phronēsis, the practical wisdom the stoics considered the highest virtue. References to Aristocreon, nephew and pupil of Chrysippus, helped papyrologist Dr. Federica Nicolardi of the University of Naples Federico II confirm the scroll's stoic rather than Epicurean character — a surprise in a collection long dominated by the works of Philodemus.
Earlier physical attempts to unroll similar scrolls had caused outer layers to flake away entirely. This time, the entire surviving portion was read without further damage. A second virtually unwrapped scroll revealed the previously unknown existence of a Book 8 of Philodemus's On Gods — proof that these artifacts are not relics but living texts, still capable of expanding what is known.
The Vesuvius Challenge, launched in 2023, has distributed hundreds of thousands of dollars in prizes to teams cracking the technical problem of reading the scrolls. That problem is now largely solved. What remains is the harder work — placing these recovered voices in their historical context, and learning, slowly, what they have to say. For Seales, the moment of scholarly interpretation arriving to meet his technical achievement felt like a kind of completion: 'For me that's the World Cup. I just won the World Cup.'
In the ash-buried library of a Roman villa near Pompeii, a scroll has been speaking again—not through human hands carefully unrolling its brittle, charred remains, but through the eyes of machines trained to see what human sight cannot. Researchers have virtually unwrapped a papyrus scroll carbonized nearly two thousand years ago when Mount Vesuvius erupted in AD 79, revealing twenty columns of text that had remained sealed inside the blackened roll without ever being physically opened. The scroll, catalogued as PHerc 1667, is only eight centimetres tall and two centimetres wide—half its original size, broken and damaged by centuries of handling—yet it holds within it the philosophical arguments of an ancient stoic thinker, likely the Greek philosopher Chrysippus, writing about ethics, human nature, and the struggle between impulse and reason.
The achievement represents a fundamental shift in how archaeologists approach fragile artifacts. Rather than risk destroying the scroll by attempting to unroll it by hand, researchers used high-resolution X-ray imaging paired with machine-learning algorithms to detect subtle variations in the papyrus fibres where ink had once been applied. The technique, pioneered by computer scientist Brent Seales at the University of Kentucky, trains artificial intelligence to recognize these microscopic differences and reconstruct the hidden text layer by layer. What emerges is not a guess or a reconstruction, but a reading—the actual words that a scribe set down two millennia ago.
The text itself speaks to the stoic preoccupation with self-governance. It discusses hormē, the concept of impulse, and warns that without reason to regulate behaviour, a person falls into harmful passions and strays from their true aims. Another passage invokes phronēsis, or practical wisdom, described as the highest virtue a stoic could attain. In one recovered line, the author writes that understanding requires remaining true to one's own nature and reason—that departing from these is to lose the very capacity to grasp truth. The scroll dates to the second or late-third century BC, making it among the oldest in the Herculaneum collection, which was dominated by works of the Epicurean philosopher Philodemus. The presence of this stoic text suggests a more diverse intellectual library than previously understood.
Dr. Federica Nicolardi, a papyrologist at the University of Naples Federico II, initially wondered whether the scroll might be an Epicurean work discussing stoic ideas. But the evidence pointed elsewhere. The text references Aristocreon, the nephew and pupil of Chrysippus, and the philosophical content aligns with stoic doctrine rather than Epicurean thought. "If this was found outside of Herculaneum, we would categorise it as a stoic work," Nicolardi said. The discovery will be announced at a conference in Naples, part of the ongoing Vesuvius Challenge, a global competition launched in 2023 that has distributed hundreds of thousands of dollars in prizes to teams using artificial intelligence and specialized software to read the carbonized scrolls.
The ordeal of time has left its mark on PHerc 1667. The scroll was broken in half at some point in its history. Earlier attempts to unwrap it caused the outer layers to flake away or crumble to dust. What survives is fragile and incomplete. Yet the virtual unwrapping proved successful—the entire surviving portion was read without further physical damage. "We don't have the full scroll, but the surviving object was unwrapped and that's a very important result because it shows that we are able to unwrap these objects completely," Nicolardi said. The achievement opens a path forward for hundreds of other carbonized scrolls still waiting in the Herculaneum collection, their contents locked away by the same volcanic heat that preserved them.
Another scroll, virtually unwrapped through the same process, revealed the words "Philodemus, On Gods, Book 8"—the first evidence that this philosophical work existed in multiple volumes. Until now, only the first book had been identified. These discoveries point to a larger truth: the scrolls are not dead artifacts, but living texts waiting to be heard again. The technical challenge of reading them has largely been solved. The work ahead is the harder, slower work of understanding what they mean, of placing them in their historical context, of listening to voices that have been silent for nearly two thousand years. As Seales reflected on the shift from technical innovation to scholarly interpretation, he described it simply: "For me that's the World Cup. I just won the World Cup: that's my victory."
Notable Quotes
We don't have the full scroll, but the surviving object was unwrapped and that's a very important result because it shows that we are able to unwrap these objects completely.— Dr. Federica Nicolardi, papyrologist at the University of Naples Federico II
For me that's the World Cup. I just won the World Cup: that's my victory.— Prof Brent Seales, computer scientist at the University of Kentucky, on the shift from technical innovation to scholarly interpretation
The Hearth Conversation Another angle on the story
How does the machine actually read text that's been burned black? What is it seeing that human eyes cannot?
The X-ray images show variations in density and composition within the papyrus fibres themselves. Where ink was applied, the papyrus absorbed it differently than blank areas. The algorithm learns to spot these minute differences—it's not reading the visual appearance of letters, but the physical signature of where ink once sat.
So the scroll never has to be opened. That seems almost too good to be true.
It is remarkable. The traditional approach would have destroyed it—the papyrus is so fragile that unrolling it risks turning it to dust. This way, the scroll stays intact while we read what's inside. It's archaeology without loss.
The text itself is about stoic philosophy—about controlling impulse with reason. Does that feel like a coincidence, or is there something fitting about it?
There's something poignant about it. A text about the discipline of reason, preserved by accident, then recovered through the discipline of mathematical reasoning. The stoics would have appreciated the irony.
How certain are they that this is Chrysippus? Could it be someone else entirely?
The evidence points strongly to him—the references to his nephew, the philosophical content, the dating. But the author's name isn't written on the scroll itself. What we have is educated inference based on what we know about the collection and the ideas expressed. It's scholarly judgment, not absolute proof.
What happens now? Is this the end of the story, or the beginning?
It's the beginning. The technical work of reading is largely done. Now comes the real work—understanding what these texts meant to the people who wrote and read them, how they fit into the intellectual life of the villa, what they tell us about Roman thought. Hundreds of scrolls are still waiting.