Language Map (IMAGE) Max Planck Institute of Geoanthropology Caption Map and family tree of the languages showing the differential locations of significant bursts in rates of change in words and grammars. Credit Greenhill et al., reproduced with permission from Proceedings of the National Academy of Sciences USA Usage Restrictions Only with appropriate credit. 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.