Natural Trap Cave, Wyoming (IMAGE) University of Adelaide Caption Abseiling into Natural Trap Cave, Wyoming -- Professor Alan Cooper descending the 100ft pitch into the cave to excavate ice age megafaunal bones. Credit Photo by Laura Weyrich, University of Adelaide Usage Restrictions Photo to be used only with articles about this research 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.