Journalism has long had the concept of the “evergreen” story — the story that was as true last May as it will be next Thursday — and slow news periods around the holidays have always been a traditional time to run them. But we think well-executed evergreen journalism is often the very best kind of journalism there is. We want to be doing it regularly, and we also want to be doing it better than traditional formats have allowed. Periodically refreshing stories so that timeless topics are covered in timely ways is one of our ideas about how to do that. This clearly isn’t the last word in how to do digital evergreens, but we think the results were encouraging. So while we work on more and better ideas around evergreen journalism, we’re going to make the December experiment a routine part of the site.