Andromedans

An enigmatic ancient civilization that has all but vanished except for their ruins, scattered across the Milky Way. It is unknown what exactly the Andromedans looked like, or if they were originally from the neighboring galaxy at all. The species left no traces or clues as to who they were, even within their vast libraries of scientific information, the Andromedans seemed to take great interest in everything, except themselves. It is believed that the Andromedans had evolved past the point of needing physical bodies, and succesfully able to trancend into an energy state, perhaps the reason for a lack of details on themselves. On the other side of the specturm, there are scientists within most modern civilizations who proclaim they or another species are direct decendents of the Andromedans.

Legacy
Despite being older than every known species within the Milky Way, the Andromedans had technological wonders on par and beyond that of anything yet conceived. While archaic in many respects, much of their discovered technology, like terraforming systems and even computers helped spark new creative insight for those that discovered it. The biggest breakthrough however, was the discovery of the FTL tunnel network that the Andromedans had set up prior to their disappearance, though incomplete for the needs of the current empires, the technology was reverse engineered and improved upon. Strangely, there were very few weapon systems, the most commonly discovered tools of combat are hand-to-hand weaponry of many different shapes and sizes.

Theory of Connection to Humanity
While extremely unpopular amongst most non-human species, it is postulated that Humans and by extension the Pleadians, are direct decendents of the Andromedans. Much of the older artifacts found within the various ruins, are appropriately sized and designed for humanoid use, sharing several characteristics of ancient Earth civilizations. Several refurbished systems are easily useable by humans, and some even respond only to humans...