Three Laws of Robotics card-readers in "The Caves of Steel" have a capacity of only a few kilobytes per square centimeter of storage medium. "Aurora", in particular, presents a sequence of historical developments which explains the lack of nanotechnology — a partial retcon, in a sense, of Asimov's timeline. There are three Fourth Laws written by authors other than Asimov. The 1974 Lyuben Dilov novel, "Icarus's Way" (a.k.a., "The Trip of Icarus") introduced a Fourth Law of robotics: Dilov gives reasons for the fourth safeguard in this way: "The last Law has put an end to the expensive aberrations of designers to give psychorobots
Sci-Fi on the Rock that around 1500 people visited the festival this year. Because this year marked the organization's fifth year, the festival staff introduced its first annual film festival, which commenced on the festival's opening night. Eleven films were submitted and screened, ten of which were from local film-makers, and one (X-Meeting) from Halifax, Nova Scotia. The winner of this film festival was a horror/comedy short called "Date With The Dead". Sci-Fi on the Rock VI occurred on April 20 to 22, 2012. Due to the growth of attendees at Sci-Fi on the Rock events, the layout of the festival underwent and overhaul