Gunz Dikika Lunate Sulcus (IMAGE) University of Chicago Medical Center Caption Using precise imaging technology to scan fossil skulls, researchers found that as early as 3 million years ago, children had a long dependence on caregivers. Credit Courtesy of Zeray Alemseged 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.