For gait Tuttle looked at the step length, stride length, stride width, and foot angle, and determined that A.
afarensis was more human-like in gait than ape-like. afarensis is an obligate bipedal hominin with the beginnings of sexual dimorphism attributed to its species, and brain size very similar to that of modern chimpanzees and gorillas.
Pleistocene fauna and Acheulean artifacts have been found in the Olpiro Beds.
Based on a trachytic tuff which occurs within the beds, the Ngaloba Beds may therefore be dated between 120,000 and 150,000 years BP.
Terry Harrison of New York University, leading to the recovery of more than a dozen new hominin finds, Dated to 3.7 million years ago, they were the oldest known evidence of hominin bipedalism at that time.