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 place at the Holiday Inn in St. John's from April 24–26, 2015. Guests include Lynda Boyd from Supernatural, Sanctuary and Republic of Doyle, Frazer Hines who is better known as the Second Doctor's companion Jamie McCrimmon from Doctor Who, Peter Williams who played Apophis on , cosplayers Adam Smith and Kevin St. Pierre, with Fat Apollo returning to Emcee certain events. The event was again a great success. The crowd was so large that it was clear that Sci-Fi on the Rock had again outgrown a venue. This would be the last year that Sci-Fi on the Rock took place