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-London York and Exeter, in February and March of that year. In January 2010, SCI-FI-LONDON made its very first trip abroad, when the festival traveled to Powai, Mumbai and Ahmedadad, to hold screenings and workshops as SCI-FI-LONDON-In-India. With many positive responses from all three venues, it is now hoped that further events of this type might be possible in the future. Not only acting as a first point of reference for the Film Festival itself, the SCI-FI-LONDON website also provides year-round "News", "Interviews", "Reviews", "Podcasts", "Listings" and "Competitions", on a similar range of topics to that of the festival. The website