Stand up and walk, when Lucy illuminated our history of bipedalism

On November 24, 1974, a team of researchers led by Donald Johanson and Yves Coppens unearthed the partial skeleton of a hominid in the Afar Valley, Ethiopia. Nicknamed Lucy in reference to the song Lucy in the Sky With Diamonds by the Beatles, which researchers listened to on the evening of its discovery, this australopithecus is an exceptionally rare find, with 40% of its skeleton preserved.

An exceptional fossil

This fossil reveals fascinating details about the species' morphology and posture Australopithecus afarensiswhose characteristics prove essential for understanding the bipedalism and movements of early hominids.

The origins of bipedalism

One of Lucy's greatest contributions is her skeleton, which illuminates the evolutionary transition between moving in trees and walking on the ground. Its broad pelvis and leg bones suggest that it was bipedal, an essential attribute to our lineage. However, Lucy also had long arms and curved fingers, signs…