Sima-de-los-Huesos-Hominins (IMAGE) Max-Planck-Gesellschaft Caption The Sima de los Huesos hominins lived approximately 400,000 years ago during the Middle Pleistocene. Credit Javier Trueba, Madrid Scientific Films 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.