The Largest of These Rocks Weighs about 100 Metric Tons (image) University of Bonn Share Print E-Mail Caption The largest of these rocks weighs about 100 metric tons, which is more than a Leopard tank. On the rock: Magdalena Rupprechter, GUtech, Oman; to the right: Gösta Hoffmann, University of Bonn. Credit © Photo: Anne Zacke Usage Restrictions This photo may be used together with the press release. 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.