When a rigid tool moves through granular material, it leaves behind a furrow — a small, legible record of how force and matter negotiate. A research team has now mapped that negotiation across 375 controlled experiments, producing a three-dimensional atlas of furrow geometry that spans multiple grain sizes, tool shapes, speeds, and loads. Published openly in Nature, the dataset does not announce a single discovery so much as it builds a shared foundation — the kind of careful, systematic groundwork upon which future understanding quietly depends.