Founder events in recent human history (IMAGE) University of California - Berkeley Caption From contemporary and ancient DNA, UC Berkeley researchers estimated when population bottlenecks occurred for several hundred groups around the world and throughout recent human history. The colors indicate the number of generations the bottleneck or founder event preceded the individuals whose DNA was sequenced. Credit Rémi Tournebize, UC Berkeley 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.