Different Models of Population History (IMAGE) Max Planck Institute of Geoanthropology Caption Different models of population history. T0 and T1 represent time slices in the present and past, respectively. a) A metapopulation, which includes population fission, fusion, gene flow and local extinction. b) A tree model, which includes population fission and extinction only. Credit Claudiu Pantiru/Max Planck Institute for the Science of Human History 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.