1.4-Million-Year Footprint Trail Suggests Group-Living Paranthropus boisei
A 1.4-million-year-old footprint surface at East Turkana, Kenya, records eight adult Paranthropus boisei moving together by a lakeshore—suggesting group living and body sizes up to about 1.8 m and 75 kg—challenging the idea of a purely solitary species and hinting at complex social behavior alongside Homo erectus in the Early Pleistocene.