Fossil chili pepper (IMAGE) University of Colorado at Boulder Caption CU Boulder’s Rocío Deanna and Abel Campos identified this chili pepper fossil in the CU Boulder Museum of Natural History collections by the unique shape of its calyx teeth: spikes on the end of the fruiting stem that hold on to the pepper. Credit R. Deanna Usage Restrictions Credit required License Original 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.