well you have to assume that there will be some sort of Materia like power out there cause im sure Races like the Cetra have lived down the ages in some distant or our own galexy.

I believe there is some planets within the many galexies kinda like Clouds own world in some ways if not all ways we the humans prolly wont find it cause it normally takes us 100 years just to come up with an invention that alters the Human Races Future. The thought of such an Space Craft to be able to travel to distant Galexies is bout as unlikely as there being some Meneral like Materia wouldn't you think??