You have probably heard of the Fermi Paradox, but if you haven’t, here it is in a nutshell: Given the high probability that alien life exists out there in the universe (bearing in mind the vastness of space and that we keep finding planets within habitable zones) why has nobody got in touch yet? If there are so many other civilizations out there, possibly at far more advanced stages than we are because of how long the universe has dragged on, surely at least one would send out messages or probes, or do what we are doing: Desperately searching for signs of life?
Answers to the paradox range from the optimistic to the downright frightening. It could be that we simply haven’t been looking long enough, nor emitting our own traceable signatures for aliens to find us yet. Or it could be that no aliens will ever make it to the point where they are able to make contact with other species, destroying themselves long before they get to the kind of tech required to do so.
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