Humboldt's Tableau (IMAGE) Aarhus University Caption In 2012, the researchers made an updated version of Humboldt's Tableau from 1802. The illustration shows how glaciers, vegetation boundaries and vegetation zones have changed in the last 210 years. Credit Illustration: Morueta-Holme et al. Usage Restrictions May be used in relation to this news release 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.