Barley Population in Bison Trail (IMAGE) Max Planck Institute of Geoanthropology Caption A bison trail through a dense wild field of little barley. This plant is one of the progenitors of a North American lost crop. Heavy bison grazing activity seems to result in dense fields of this plant in the wild, which would have been easy for early foragers to collect the seeds from. Credit Natalie Mueller Usage Restrictions This image may only be used in the context of reporting on this publication and with appropriate credit information. 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.