Study co-author George Long (IMAGE) McMaster University Caption McMaster University Credit George Long is co-lead author of the study and a graduate student of bioinformatics in the Department of Anthropology. Usage Restrictions None. 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.