The footprints, dating back about 1.43 to 1.5 million years, suggest that this species grew much larger than researchers once believed. For decades, scientists considered Paranthropus boisei noticeably smaller than Homo erectus, another human ancestor that lived during the same period. They identified the tracks as belonging to Paranthropus boisei by examining their shape, stride, and walking pattern. This behavior suggests that Paranthropus boisei may have lived in more organized social groups than scientists previously imagined. This remarkable discovery shows that even a handful of ancient footprints can reshape our understanding of human evolution.