LETTER TO THE EDITOR The life journey of Professor S. Penczek through the realm of polymer science K. Matyjaszewski, K. Matyjaszewski Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania, USA Search for more papers by this authorS. Slomkowski, Corresponding Author S. Slomkowski Department of Functional Polymers and Polymer Materials, Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Lodz, Poland Correspondence S.