Laetoli's a site in Tanzania, dated to the Plio-Pleistocene and famous for its hominin footprints, preserved in volcanic ash (Site G). The site of the Laetoli footprints's located 45 km south of Olduvai gorge. Professor Terry Harrison, a physical anthropologist at New York University, has continued research at the site since the late 1990s. Date The footprint-bearing layers are Pliocene in age, dated by the K/Ar method to 3.6 million years ago (m.y.a.). Hominid footprints A line of hominid fossi… (More on Laetoli)