In the mid-late 1980s, however, there was a repositioning from being a general periodical covering all aspects and publishers within the hobby niche to a focus almost exclusively on Games Workshop’s own products and publications. The last Dungeons and Dragons article appeared in issue 93, with the changeover being complete by issue #102. In this respect it took over some of the aspects of the Citadel Journal, an intermittent publication that supported the Warhammer Fantasy Battle game. The magazine has always been a conduit for new rules and ideas for GW games as well as a means to showcase developments. It often includes scenarios, campaigns, hobby news, photos of recently released miniatures and tips on building terrain and constructing or converting miniatures.
However, Dr. Thomas explained to the press in May 2013 that the ring arcs are much more tenuous than the fully formed rings of Saturn. As a matter of fact, the ring arcs are so delicate and thin that it would take about ten billion years for just 1 meter of blowing icy snow to collect within the craters of Methone. "We are just beginning to try and figure out quantitatively how all this might smooth a surface," Dr. Thomas said in the May 17, 2013 New Scientist. In addition, the newly collected data derived from the GRAIL mission helps astronomers redefine the late heavy bombardment--a proposed episode that occurred about 4 billion years ago, during which a heavy shower of projectiles pelted the bodies of the inner Solar System, including Earth and its beloved Moon, creating heavy lunar cratering in the process. The concept of the late heavy bombardment is primarily based on the ages of massive near-side craters that are either within, or adjacent to, dark, lava-flooded basins (lunar maria), that are named Oceanus Procellarum and Mare Imbrium. However, the composition of the material existing on and below the surface of the lunar near-side indicates that the temperatures beneath this area are not representative of Earth's Moon as a whole at the time of the late heavy bombardment. The difference in the temperature profiles may have caused scientists to overestimate the amount of crater-excavating projectiles that characterized the late heavy bombardment. New studies by GRAIL scientists indicate that the size distribution of impact craters on the lunar far-side is a more accurate reflection of the crater-forming history of the inner Solar System than those pock-marking the near-side.