This book is actually the translation and modernization of “Triângulo Espacial” published in Brazil in 1998 by the editor “Graphia.” In this English version, I introduced some necessary modifications, especially concerning dates. In the original, the novel begins in 2018, which is now very near us to have a minimum of credibility. On the other hand I had the opportunity of correcting inappropriate approaches. I hope that my readers enjoy this Science Fiction novel, which tells us how an expedition to Mars discovers a tunnel organized like a museum. There the astronauts learn how the Alimartines (one of the two species who had lived in the Red Planet) goes to Earth and try to establish a colony. The foundation of this colony had a very specific and urgent reason. Mars was rapidly deteriorating and it was absolutely necessary to find a place to save their species. This is only the beginning of the story, which varies in time and space. While the story of the Alimartines goes on in Mars about three hundred thousand years before, the Astronauts found out in the cave the existence of another species: the Cribonguians. This species try hard and manage to use the American industrial park to build an intergalactic vehicle. They knew that the Alimartines, their enemies had emigrated to another solar system. The Americans resisted fiercely to the Cribonguians fearing that they might want to stay on Earth forever. You, readers, must go through the book to discover how the two species meet after three hundred thousand years.