Squash pollen (IMAGE) Max Planck Institute of Geoanthropology Caption Elektronenmikroskopische Aufnahme eines Kürbispollenkorns in einem Koproliten (Kotstein), 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.