If intelligent life is at all likely, there ought to be many civilizations that have had millions of years technological head start on us. Given one species with galactic ambitions, but technology only modestly beyond ours, it would only take them one million years to colonize the entire galaxy. So why do we not see any evidence whatsoever?
If intelligent life is at all likely, there ought to be many civilizations that have had millions of years technological head start on us. Given one species with galactic ambitions, but technology only modestly beyond ours, it would only take them one million years to colonize the entire galaxy. So why do we not see any evidence whatsoever?
This is the Fermi Paradox.