Figure 3 (IMAGE) University of Copenhagen Caption The volcano Chimborazo, Ecuador, that Alexander von Humboldt surveyed in 1802. Photographer: Spyros Theodoridis/CMEC Credit Spyros Theodoridis/CMEC Usage Restrictions Use is permitted only with credit as listed. 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.