Hadza Participants in Resting Postures (IMAGE) Proceedings of the National Academy of Sciences Caption Hadza participants in resting postures. Credit Image courtesy of David A. Raichlen. Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.