Archaic sequence length decay (IMAGE) Aarhus University Caption Archaic sequence length decay (black bands on chromosomes) for different populations sampled at multiple time points. The length of generation intervals (GI) is represented by the color gradient on the tree (yellow : long GI; maroon : short GI). Credit Moisès Coll Macià, Aarhus University Usage Restrictions Credit must be given to the creator. License CC BY 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.