Mold Coated Cast with Gold Coated Replica (IMAGE) University of Leicester Caption This is a high fidelity rubber mold of hadrosaurid dinosaur teeth, with a gold coated replica for measurement of roughness of the tooth surfaces. The surfaces have scratches that were created as the dinosaur fed on vegetation 67 million years ago, and measuring the roughness can reveal what kind of food they ate. The original teeth are too large to transport to the instrument that measures roughness. The image below shows the roughness of a small area, with colors representing the heights of ridges, troughs and peaks on the surface. Credit University of Leicester 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.