An article published in the journal “eLife” reports the claim that the foot morphology of Ardipithecus ramidus, a hominin that lived about 4.4 million years ago, is the most similar to that of chimpanzees and gorillas among apes. Thomas Prang of the New York University’s Department of Anthropology examined the characteristics of Ardipithecus ramidus’ feet to assess the relationship between the type of locomotion of a species and its skeletal characteristics. The aim is to reconstruct the evolution of bipedalism and estimate the appearance of the last common ancestor of humans and chimpanzees.