Neanderthals create world’s first string

A white splotch on the underside of a stone tool nearly escaped notice entirely. Then Bruce Hardy, a paleoanthropologist at Kenyon College in Ohio, put it under a microscope. What he found wasn’t contamination — it was a mass of twisted fibers, wound together with unmistakable intention, from a Neanderthal site in southeastern France. It was the oldest known piece of string ever found, and it had been sitting undetected on a rock for somewhere between 41,000 and 52,000 years.

• The cord fragment — just 6.2 millimeters long — was discovered at the Abri du Maras rock shelter in the Ardèche River valley of southeastern France.
• Made from the inner bark fibers of a conifer, it consists of three bundles of fiber twisted together using a specific two-direction technique that required planning and numerical understanding.
• Before this find, the oldest known cord fragments dated to roughly 19,000 years ago, from a site in Israel — making this discovery more than twice as old.

A find hiding in plain sight

The Abri du Maras site had been under excavation since 2006, with researchers carefully working through layers of Middle Paleolithic material — stone tools, reindeer bones, the physical residue of Neanderthal daily life. Neanderthals occupied the site between 90,000 and 42,000 years ago, long before anatomically modern humans arrived in western Europe in significant numbers.

The cord fragment turned up adhered to a thin stone flint tool recovered in the site’s sediment. Hardy had previously found individual twisted fibers at Abri du Maras, which hinted at string production but stopped short of proof. This was different. Under spectroscopy and microscopy, the fragment revealed itself as a deliberate, structured object: three bundles of inner bark fiber, each twisted clockwise in an S-twist, then wound together counterclockwise in a Z-twist to create a stable, durable cord.

That specific two-direction technique wasn’t accidental. It is the same fundamental method humans use to make rope today.

What the construction reveals about Neanderthal cognition

The mechanics of making this cord carry surprising cognitive implications. To produce a three-ply string, a maker must simultaneously hold multiple actions in mind — managing the direction and tension of each strand while tracking how the whole structure comes together. Researchers writing in Scientific Reports argued that this process implies a mathematical understanding of pairs, sets, and numbers, as well as the ability to follow a multi-step procedure without losing track of where you are in the sequence.

That’s not a trivial mental task. It requires what cognitive scientists call “context-sensitive operational memory” — the ability to shift attention between steps without losing the thread, literally or figuratively.

The raw material choice adds another layer of complexity. Neanderthals used bast fiber, the inner bark of a conifer. Harvesting it well requires knowing when in the seasonal cycle trees are easiest to process — early spring, when rising sap makes fibers easier to separate. That knowledge implies not just familiarity with specific trees but an understanding of how they change across time, and a capacity to plan around those changes.

Abri du Maras and the problem of perishable evidence

One reason this find matters so much is how rare it is. As Hardy noted, almost everything researchers want to find from Paleolithic sites is gone. Organic material — plant fibers, hides, wood, fabric — decays. What survives in the archaeological record are bones and stone, the hardest and least representative fraction of what ancient people actually used and made.

The cord at Abri du Maras survived only because it ended up in a microenvironment directly beneath a stone tool, which acted as a kind of accidental capsule, slowing the decay that would otherwise have erased it. It’s a reminder that the absence of evidence is not evidence of absence. Researchers widely suspect that cordage technology is far older than any surviving example — John Shea, a paleoanthropologist at Stony Brook University, has pointed out that some very old stone tools appear designed to fit handles, which would have required lashing to stay secure.

What string made possible

Twisted fiber is one of those technologies so foundational it’s easy to underestimate. Once a hominin can make reliable cordage, the downstream possibilities expand dramatically. Researchers note that cord is the basis for clothing, bags, nets, mats, baskets, hafted tools, and eventually boats. Each of those things changes what a group of people can do — how far they can range, how much food they can carry, how efficiently they can hunt, how reliably they can stay warm.

The Neanderthals at Abri du Maras were almost certainly not making string for the first time when they produced this particular cord. They were practicing a skill they already knew. The real origin of fiber technology lies further back, in a period that left no surviving evidence at all.

Rewriting what we thought we knew about Neanderthals

The string find arrived as part of a broader reassessment of Neanderthal capability that has been building for decades. The old picture — Neanderthals as cognitively inferior dead-enders, outcompeted and replaced by smarter modern humans — has steadily collapsed under the weight of new evidence. Researchers have now documented Neanderthal production of birch bark tar, shell beads, cave art, and now structured cordage.

The authors of the Scientific Reports paper were direct about the implications: the idea that Neanderthals were cognitively inferior to modern humans is becoming increasingly difficult to defend. They persisted across Europe and western Asia for hundreds of thousands of years, through repeated climate shifts and ecological upheaval, using technologies that required real planning, real knowledge, and real skill.

A 6.2-millimeter scrap of ancient cord might seem like a small thing. But it points toward a version of Neanderthal life that was richer, more technically sophisticated, and more recognizably human than the old story ever allowed.