Xinyi Liu (IMAGE) Washington University in St. Louis Caption Xinyi Liu is an archaeologist of food and environment who studies plant domestication, agricultural origins and prehistoric food globalization. Credit Washington University in St. Louis Usage Restrictions For editorial purposes 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.