Kenyan footprints show large Paranthropus boisei walked in groups

Scientists have uncovered a set of ancient footprints in Kenya that document eight *Paranthropus boisei* individuals moving together about 1.4 million years ago. The tracks, preserved in a dry riverbed, show that several of the hominins reached body sizes comparable to modern humans, a finding that challenges previous assumptions about the physical limits of this species.

The fossilized prints, dated using stratigraphic analysis and radiometric techniques, provide the first direct evidence of group movement in *P. boisei*. The spacing and depth of the footprints suggest a coordinated walk, implying that these early hominins may have lived in more complex social units than the solitary or small family groups traditionally associated with them. The large body sizes inferred from the track dimensions also raise questions about the species’ dietary and ecological adaptations.

These discoveries refine our understanding of *Paranthropus* social structure and physical diversity. By revealing both larger-than-expected body sizes and evidence of collective travel, the footprints underscore the need for further study of early hominin behavior and its evolutionary implications.