Which hominin species made the 3.66-million-year-old Laetoli footprints in Tanzania?

Australopithecus afarensis made the 3.66-million-year-old Laetoli footprints in Tanzania.

The footprints were preserved in volcanic ash at Laetoli, a site in northern Tanzania. They show at least two, probably three, early hominins walking across the ash shortly after an eruption. Their relatively compact footprints include a forward-pointing big toe and an arched foot, evidence of habitual upright walking.

The trackway is associated with Australopithecus afarensis, the same species represented by the famous fossil skeleton known as Lucy. The footprints do not prove that Lucy herself made them; Lucy was found elsewhere and is about 3.2 million years old.

A common mix-up is confusing Laetoli with the Ileret footprints in Kenya, which are much younger and associated with Homo erectus. Laetoli is especially important because it records locomotion directly rather than inferring it only from bones.