I also want to add that age-wise we might be pretty old. Our galaxy (13B) solar system (5B), our planet(4.5B)are pretty old considering the Big Bang happened 14B year ago.

Definitely in civilization time that leaves a lot of room for a few milion years here and there, but still, we could be the oldest and most advanced (at the same time I do hope there is a civilization out there less eccentric and egocentric as ours...)