Transformers: Rise of the Dark Spark film series and the video game series, consisting of "Transformers: War for Cybertron" and "Transformers: Fall of Cybertron". The Dark Spark is a powerful artifact that is capable of ripping holes in dimensions, which brings two "Transformers" universes together. The story takes place before the Ark is launched in "Fall of Cybertron", while in an alternate universe it takes place before the events of "Age of Extinction". The game begins in continuity with the film, wherein a mysterious purple meteor crashes into Earth. The Autobots reach the crash site and Optimus sees an ancient Cybertronian relic called the Dark Spark,
Mission: Earth, Voyage to the Home Planet book might be used more successfully to supplement the curriculum in those areas than in units on space flight per se". Weischedel said the book "provides a unique look at a new method of research and an opportunity for youngsters to read one scientist's account of what it's like to engage in this exciting field of endeavor". "Horn Book Review" called the book "a uniquely personal account", and said it "features a crowded design, but the many color photographs throughout the text are fascinating". "Mission: Earth, Voyage to the Home Planet" is listed in the book "Teaching U.S. history through