In May 2024, a study in Science Advances gave new information about early human ancestors. The study was done in southern Africa. It looked at hand fossils from two species: Australopithecus sediba, which lived 2 million years ago, and Homo naledi, which lived 300,000 years ago. Scientists used a method called 3D scanning to study finger bones. This method showed how the fingers were used. Both species walked on two legs and used their hands for climbing, holding objects, and using tools. The goal of the study was to better understand how human hands changed over time.

The research showed that each finger had a different shape and size. This meant early humans used different fingers for different jobs. When a finger was used more, it had more pressure, and the bone became thicker. Scientists said these fossils are very rare and gave useful data. New tools helped them see small details in the bones. These results gave a more complete picture of how early people lived and used their hands.