OAA_B (IMAGE) Estonian Research Council Caption West African migrations. Author: Saoni Banerji Credit The graph is made by Saoni Banerji, and the map was downloaded from Wikimedia. Usage Restrictions Please use the graph only with the reference to the paper and author. 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.