Figure 3.

Dendrogram of the global string figure sample. Figure 3 is also available as a high-definition text-searchable PDF in the electronic supplementary material (figure S1) [49]. Individual string figures appear at the tips of the tree and are coloured by the geographical region (refer to the world map in the centre for colours). Higher order clusters group increasingly diverse figure designs. Clusters at the outermost edge of the tree contain identical or near-identical string figures. Clusters described in electronic supplementary material, table 1, are numbered and connected with a crossbar at the tip (the cluster numbers refer to the respective section in electronic supplementary material, table 1). Likewise, clusters close to each other (under the same branch) contain structurally similar string figures.