Squash pollen (IMAGE) Max Planck Institute of Geoanthropology Caption Scanning Electron Microscopy (SEM) picture of a squash pollen grain in coprolite from the Cueva de los Muertos Chiquitos archaeological site, Rio Zape Valley, Durango, Mexico Credit Karl Reinhard Usage Restrictions Please provide credit information with reuse 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.