Interpretations of 2001: A Space Odyssey machines". Kubrick was also confronted with the fact that, during the production of the film, the US and USSR had agreed not to put any nuclear weapons into outer space by signing the Outer Space Treaty. Alexander Walker in a book he wrote with Kubrick's assistance and authorisation, states that Kubrick eventually decided that as nuclear weapons the bombs had "no place at all in the film's thematic development", now being an "orbiting red herring" which would "merely have raised irrelevant questions to suggest this as a reality of the twenty-first century". In the Canadian TV documentary "2001 and Beyond",
A Time Odyssey Clarke's previous "Space Odyssey" novel series. In the introduction to the "Time's Eye", Clarke describes the premise as "neither a prequel nor a sequel" to "Space Odyssey", but an "orthoquel" (a neologism coined by Clarke for this purpose, combining the word "sequel" with "ortho-", the Greek prefix meaning "straight" or "perpendicular", and alluding to the fact that time is orthogonal to space in relativity theory). In "Space Odyssey", a race of benevolent godlike aliens with highly advanced technology decides to use machines called "monoliths" to travel across the galaxy with the intention to ensure the survival chances of intelligent life