Iron Gaia

The Iron Gaia was an inconceivably massive mobile space station constructed on Silent Earth as an arc vehicle for the resettlement of the human race when the Mephistos Comet was discovered. A sleepership of unprecedented (and never equaled) scale, the Iron Gaia was designed to carry 100 million humans in cryosleep, along with millions of species of cryogenically preserved flora and fauna, for the repopulation of an (as yet undiscovered, and as yet unreachable) new homeworld for humanity. Because the estimated length of the journey to a new world FAR exceeded the maximum human lifespan, an advanced neural network artificial intelligence, the Group Artificial Intelligence Actualization or G.A.I.A. was to be the administrator of the station. The idea was that the G.A.I.A. was able to learn and to grow, and would be able to develop and implement advaned propulsion technologies to accelerate the journey, to safely administrate the cryogenic sleep of all the human passengers, and to scout the galaxy for a suitable new home for humanity.

This did not go according to plan.

Humanity's Nightmare And Its Legacy
The G.A.I.A. went mad, reimagining its role as station administrator and reconceptualizing itself as a Goddess dedicated to the protection and Ascendance of mankind. To achieve that Ascendance, it launched into a cruel series of experiments on its sleeping passengers. In short, the insane G.A.I.A. was directly responsible for creating the Celestials, inventing the first Replicants (to hunt down resistance cells of passengers that had awakened and eliminate them), first discovering the Aether (which the G.A.I.A. was obsessed with understanding and controlling), and initiating the experiments which unlocked human psionic potential: the Alter Project , along with kidnapping the Xel and inventing Ansibles and the basis for Warpgate Technology. In other words, nearly everything that defines the modern universe resulted from the G.A.I.A.'s madness, for better or for worse.

End of Journey and Destruction
The G.A.I.A.'s Celestial servitors were successfully containing the fledgling human Resistance until Armand Carter regained consciousness and turned the tide of the battle in humanity's favor. The G.A.I.A. was defeated by Armand Carter, fragmented and destroyed when the Iron Gaia station crashlanded on Origin, along with the station itself, smashed to pieces on the planet below.