Extended Data Fig. 4: Foot and gait comparisons across all comparative species.
From: Footprint evidence of early hominin locomotor diversity at Laetoli, Tanzania
(a) Forefoot width to step length; (b) heel width to step length; (c) heel width to forefoot width; and (d) stride width to step length. Notice that for foot proportions (c) and stride width (d), Laetoli A is unlike the tracks produced by bears. In (d) the negative value in Laetoli A represents the fact that the track is demonstrating cross-stepping. (a-c) Boxplot represents median (center line), upper and lower quartiles (box limits), range (whiskers), and outliers (points) and individual footprints sample sizes for each species are indicated in the figure panels. (a-d) In all plots, n = 1 for all Laetoli trackways, and chimpanzees were traveling bipedally. Data sources match Extended Data Table 1.
