Why set up a peeriodical? The traditional journal has changed remarkably little in centuries and many people feel that scientific publishing is stuck in a rut, subject to a corporatist drift, and is not serving science optimally. The advent of preprints in many fields beyond those served by the ArXiv is liberating the dissemination of research, but most other journal functions have not been replaced effectively. Now you—all researchers—have the opportunity to select and certify research according to your own criteria. We expect peeriodical subject matters and editorial policies to be extremely varied. Some peeriodicals may wish to target narrow domains, while others will adopt a generalist approach. Some peeriodicals will be inclusive, focusing on discovery, whereas others may aim to enforce stringent quality criteria, prioritising certification. The point is that all approaches are permitted and supported—we hope you will innovate! You can create multiple peeriodicals. It will be users and readers who decide which peeriodicals they find useful and interesting. Users can sign up to receive alerts from any peeriodical they wish.

How will Peeriodicals fit into the publishing landscape? We see them as a space without entry barriers in which researchers can innovate and explore new approaches to scientific dissemination, in parallel to the traditional publishing industry. There are related and complementary initiatives, notably the overlay journals promoted by Tim Gowers, exemplified by Discrete Analysis, but also Science Open Collections, PLoS Channels, the APPRAISE initiative and Peer Community in... Each of these projects has their own specificities and goals. Nobody yet knows exactly what the future will look like, but we strongly believe that we are about to experience a period of rapid evolution in the dissemination of science and we hope that Peeriodicals will inspire and help you to share your imagination and expertise with the whole research community.