Mutagenesis's Impact Factor has risen to 2.898. To celebrate, we have selected the most cited articles which contributed to the new Impact Factor, and made them freely available to explore online.Mutagenesis is a process characterised by change in the genetic material of an organism by the influence of mutagens. Mutagenesis can occur naturally and leads to cancer. It can also be done under laboratory conditions.Mutagenesis is an international multi-disciplinary journal designed to bring together research aimed at the identification, characterization and elucidation of the mechanisms of action of physical, chemical and biological agents capable of producing genetic change in living organisms and the study of the consequences of such changes.