Sort a Stone Age campsite by what can survive 35,000 years, and the durable pile will look familiar: stone, bone, teeth and ivory. The other pile contains cord, bags, handles, wooden tools, hides and much of ordinary life.
Mostly, that second pile is gone.
This creates a wonderfully unfair naming system. We call an enormous span of human history the Stone Age, then reconstruct its technology from the material least likely to rot. Stone earned top billing by refusing to leave.
A tool for something missing
In 2015, archaeologists working in Hohle Fels Cave in southwestern Germany recovered 15 fragments of worked mammoth ivory. Reassembled, they formed a baton about 20 centimeters long with four holes. Each hole had carefully cut spiral grooves. The surrounding layer dates from roughly 35,000 to 40,000 years ago, although the researchers say the artifact itself cannot be dated more precisely.[1]
Objects like this had been described as symbols, ornaments, shaft straighteners or leather-working tools. The grooves suggested another possibility: perhaps fibers were meant to turn through them.
The researchers made a replica and tried sinew, flax, hemp, nettles, willow, linden and cattail. Some materials worked poorly. Cattail worked especially well. With one person twisting each strand and another operating the baton, a group of four or five people typically made five meters of strong, supple rope in ten minutes. The grooves helped break down and align the fibers while keeping them under torsion.[1]
The result is good evidence for one way people could have made thick rope. It is not a time machine. The experiment does not prove that every perforated baton was used this way, and the tool was not necessary for thin cord, which can be twisted by hand. The paper's strength is narrower and more interesting: the shape, microscopic residues, wear traces and successful reconstruction all point toward fiber processing.[1]
The rope produced in the experiment is vivid. The ancient rope is absent. Its production tool survived because somebody made it from mammoth ivory.
Six millimeters against oblivion
Occasionally the missing material gets lucky. At Abri du Maras in France, researchers found a cord fragment clinging to the underside of a stone flake. It is only 6.2 millimeters long and about half a millimeter wide. Microscopy showed three bundles of inner-bark fibers, each twisted one way and then plied together in the opposite direction. The archaeological level has dates ranging from about 41,000 to 52,000 years ago and is associated with Neanderthals.[2]
A fragment shorter than a fingernail cannot tell us whether it belonged to a handle, bag, net or something else. The researchers explicitly leave those possibilities open.[2] What it does establish is that somebody prepared plant fibers and understood how opposing twists keep a multi-ply cord from unraveling.
That changes the scene around the stone tools. A point can become a spear when it is fixed to a shaft. Cord can also make snares, nets and containers, though the presence of cordage does not prove any particular one of those objects existed at a given site. Rope is rarely the glamorous part of a machine. It is the part that lets the other parts cooperate.
The archive chose a favorite
A recent survey of prehistoric fiber research calls perishable technology archaeology's missing majority. It also makes the practical consequence easy to see: if cordage was needed for carrying, hafting and binding, people had to gather suitable plants, process them and keep making more. The surviving stone point may record a few minutes of knapping. The vanished binding around it may represent seasonal materials, soaking, twisting and coordinated labor.[3]
Some of that larger picture remains inference, and it should. Experimental archaeology can show that an object works as a rope-making tool; it cannot recover the conversation of the people using it. A rare fiber fragment can prove cordage existed; it cannot inventory every cordage object in the camp.
But absence is not neutral evidence. Plant fiber, leather and wood generally disappear more readily than stone, so a display case full of blades and scrapers is partly a record of ancient skill and partly a record of decay.
The name Stone Age is accurate about the excavation tray. It is probably a poor description of the room that tray came from. A better mental picture has stone edges everywhere, but it is held together by technologies we can barely see.
Sources
[1] Science Advances: Rope making in the Aurignacian of Central Europe more than 35,000 years ago
[2] Scientific Reports: Direct evidence of Neanderthal fibre technology
[3] Knowable Magazine: Rope, twine and thread: Invisible technologies of the Stone Age