George Kamenov, University of Florida (IMAGE) University of Florida Caption UF geology professor George Kamenov has published research that shows trace amounts of lead in modern and historical human teeth can give clues about where they came from. Credit Ray Carson/UF Photography Usage Restrictions with credit 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.