Jorg Karger graduated in Physics at Leipzig University (Diploma 1967, PhD 1970, Habilitation 1978) where, in 1994, he became full chair of Experimental Physics/Interface Physics. His research activities have been dedicated to the study of diffusion phenomena in general and the development of new experimental techniques for studying diffusion in nanoporous materials and continued unabatedly after his retirement in 2009. He has published several books, including Diffusion in Condensed Matter (Springer 2005, with Paul Heitjans), Leipzig, Einstein, Diffusion (LeipzigerUniversitätsverlag 2007) and Diffusion in Nanoporous Materials (Wiley-VCH 2012, with Douglas Ruthven and DorosTheodorou), which became standard in the field. His most recent book on Diffusive Spreading in Nature, Technology and Society (Springer 2018, with Armin Bunde, Jürgen Caro and GeroVogl) introduces into diffusion processes as an ubiquitous phenomenon of truly interdisciplinary relevance. His work has been recognized by numerous awards, including the Donald W. Breck Award for zeolite research, the Max Planck Research Prize and election to the Saxon Academy of Sciences. Exotics among his more than 600 publications are entries in the Guinness book of records with the largest orchestra of bicycle bells and a computer game, attained during the Physics Sunday Lectures at Leipzig University.