Laetoli

Laetoli is 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 is located 45 km south of Olduvai gorge. The location was excavated by archaeologist Mary Leakey in 1978. “The Laetoli Footprints” received significant recognition by the public, providing convincing evidence of bipedalism in Pliocene hominids based on analysis of the impressions.

• http://en.wikipedia.org/wiki/Laetoli