John Lukacs, University of Oregon (image) University of Oregon Share Print E-Mail Caption John Lukacs, professor of anthropology, shows a 250,000-year-old "Kabwe skull" from Africa. The sex is unknown, but this specimen has 15 teeth still intact or partially present -- 12 of them have obvious damage from dental caries. Credit Jim Barlow Usage Restrictions None Share Print E-Mail 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.