Ancient Nilometer (IMAGE) GFZ Helmholtz-Zentrum für Geoforschung Caption Ancient Egyptians measured the level in the Nile River every year in the so-called “Nilometers” that were located in the lower Nile Valley. The purpose of these measurements was to forecast the harvest. These unique records of yearly floods cover a large part of the Common Era and have provided insights into the climatic drivers of Nile floods. Because the Nilometer records and the here presented new record of past floods have an annual resolution and length, we could compare the pacemakers under different climatic conditions. Credit Copyright: CCBY-SA Baldiri Usage Restrictions Credit must be given to the creator. Adaptations must be shared under the same terms. License CC BY-SA 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.