“In a recent paper in�Chem�(Cell Press), the Sumerlin Research Group reports a new polymerization strategy that leads to the highest molecular weight polymers ever prepared by a controlled radical polymerization (CRP) method. Developments in CRP have revolutionized polymer chemistry over the last two decades, allowing access to polymers with well-defined and predictable molecular weights, narrow molecular weight distributions, block copolymers, and complex macromolecular architectures. More than 30,000 papers have been published in this area since the mid 1990?s. However, applying CRP techniques for the synthesis of high molecular weight polymers has consistently proven to be challenging.”