User blog comment:GruffMuff/How did the Reapers invade the galaxy in Mass Effect 3?/@comment-1596833-20111120022704/@comment-1596833-20111214055119

I'm syaing that it's possible other species have experienced what the Citadel races and humanity are doing right now, but had more time. Yea there's a lot of holes in that, but I doubt Shep and his buds are the only ones capable of investigating relays, dead ships, and lost planets.