13,000 Years Ago, Someone Painted a Bison in the Dark. We Just Found Out When.
The Font-de-Gaume cave sits in a limestone hillside near the town of Les Eyzies in the Dordogne region of southwestern France. It has been a UNESCO World Heritage site since 1979. It contains over 200 painted and engraved figures, including more than 80 bison, roughly 40 horses, and over 20 mammoths, along with handprints, abstract motifs, and what appears to be a human or animal face. It is the only cave in France with polychrome cave paintings still open to visitors, and entry numbers are strictly limited to protect the underground environment.
Denis Peyrony, a local schoolmaster, discovered the paintings in September 1901, though local people had used the cave for years without understanding what the painted walls meant. The art has always been assumed, based on its style, to date to the Magdalenian period, roughly 16,000 to 18,000 years ago. No one had been able to verify that assumption through direct dating until now. A study published on March 9, 2026 in the Proceedings of the National Academy of Sciences changed that. For the first time, researchers have radiocarbon-dated paintings in Font-de-Gaume directly.
Why This Cave Could Not Be Dated Until Now
For decades, the standard assumption about Dordogne cave art was that its black pigments were made from manganese oxide, a mineral compound containing no organic carbon and therefore impossible to radiocarbon date. No one had systematically tested whether this was actually true for every figure in every cave.
In 2023, Ina Reiche of the French National Center for Scientific Research (CNRS) and her colleagues used Raman microspectrometry and hyperspectral imaging to examine the black pigments in Font-de-Gaume without touching the walls. They found traces of charcoal, a carbon-based material, in several of the black figures. Charcoal contains carbon-14 and can be dated. The uniform presence of charcoal throughout the black outlines of the figures, rather than just on their edges, ruled out contamination from tourist activity or modern soot. Someone had deliberately used charcoal as a pigment.
The team received exceptional permission to take four microscopic samples from two figures: a bison and a figure interpreted as a mask. The samples were taken from the pigment layer itself, using a process so delicate that the removed material is invisible to the naked eye.
What the Dates Showed
The results confirmed a Paleolithic age for both figures, though the specific dates were somewhat more recent than style-based estimates had suggested. The bison was painted between approximately 13,162 and 13,461 years ago. Two sections of the mask dated to roughly 15,000 years ago. A third section of the mask returned a date of around 8,500 to 9,000 years ago. The researchers suggested this section may have been retouched by a later person, or possibly represents accidental contamination from a more recent carbon source. The possibility that two different people, separated by thousands of years, worked on the same wall in the same cave is not something that can be ruled out.
The bison date, around 13,000 years ago, places it in the Magdalenian period but toward the later end of the broad estimate that had been used based on style alone. Lead researcher Ina Reiche described the significance directly: ‘We provide the experimental confirmation of the Paleolithic age of cave art in the Font-de-Gaume cave. This result represents a scientific breakthrough and a paradigm change.’
Font-de-Gaume is fragile. Lascaux’s closure stands as a warning about what happens when too much human activity reaches a decorated cave. The bison that was painted around 13,000 years ago survived intact until 1901 when Peyrony found it, and has survived the century of tourism and research since. Whether it continues to survive depends on how carefully the site is managed in the decades ahead.
The person who painted it was standing in near-total darkness, with a small flame for light, holding charcoal against limestone. Thirteen thousand years later, a scientist took a sample smaller than a pinhead and told us exactly when. What would you have painted in that cave?