Says Ulf, who has been in the full-
time service for 45 years,“ The preaching work makes me tired, but it brings true satisfaction and real meaning to my life.”.
Ulf Büntgen, head of dendroecology at the Swiss Federal
Research Institute for Forest, Snow and Landscape, and colleagues now report in Nature Geoscience that a study of tree-ring measurements in the Altai mountains of Siberian Russia and the Alps of Europe confirms a long, cool interval in the 6th and 7th centuries, which they attribute to volcanic eruption.