I often notice this when reading science magazines, like scientific american or science news aggregators like sciencedaily. There is a lot of topic repetition. While topic repetition helps leave "nothing uncovered" for people who are new to the magazine, I'm wondering if many veteran readers have noticed significant amounts of topic repetition. Surely each magazine will probably bring something new to cover (that's scientific research after all), but much of the material (especially the introductory material) is still the same. And do you often notice this with non-science magazines?