Our first steps? Fossil may boost case for earliest ancestor

This photo provided by the University of Poitiers in August 2022 shows the Djurab Desert where the fossil sites that yielded remains of Sahelanthropus tchadensis are located. Based on arm and leg fossils, scientists concluded that Sahelanthropus, an ancient hominin species from Chad, walked upright - which would add evidence that it’s the earliest human ancestor dug up so far, according to a study published on Wednesday, Aug. 24, 2022, in the journal Nature. (MPFT/PALEVOPRIM/CNRS – Universite de Poitiers via AP)

Our first steps? Fossil may boost case for earliest ancestor