Cranium Frontal (IMAGE) Cleveland Museum of Natural History Caption The 3.8 million-year-old cranium of the 'MRD' specimen of Australopithecus anamensis Credit Photograph by Dale Omori, courtesy of Cleveland Museum of Natural History 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.