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 Science: Physics of the Impossible filming for the second season of "Sci Fi Science", consisting of 12 new episodes. It started broadcasting on September 1, 2010. Sci Fi Science: Physics of the Impossible Sci Fi Science: Physics of the Impossible (also called Science of the Impossible) is an American documentary television series on Science which first aired in the United States on December 1, 2009. The series is hosted by theoretical physicist Michio Kaku and is based on his book "Physics of the Impossible". In each episode, Dr. Kaku addresses a technological concept from science fiction and designs his own theoretical version of the technology