Ancestral footprints

The importance of the fossil footprints shows that early humans were bipedal as early as four million years ago. The Laetoli footprints were discovered in 1978, in a remote part of Tanzania by Andrew Hill, a paleontologist and professor at Yale University; working with Mary Leakey's research team.

Approximately four million years ago, a volcano erupted blanketing the landscape with volcanic ash. Following precipitation, the ash became like plaster; producing an ideal surface for footprint impressions of the numerous animals.In time the surface turned into a hard cement preserving its captured tell-tale signs .
A member of our early human species, Australopithecus afarensis, provided a record of their passing, the fossil footprints indicate two individuals, walking side by side.