Archaeological site found by Paul Abell and Mary Leakey in 1976; contains more than 50 hominid footprints made by three individuals, a small individual on the left, a large one on the right, and a third, medium-sized set superimposed on those of the larger individual on the right; the biomechanics are remarkably similar to those of the modern human. The footprints were made in Tuff 7 of the Laetolil Beds, an airfall tuff dated 3.75-3.6 mya. Aka the footprint tuff, the G-1 Trail and the G-2/3 Trail.