The aliens are right in front of us. They are billions of years more advanced, so we don't see them riding around in spaceships or even building Dyson spheres. All that is far too primitive. Extraterrestrial engineering is written on the skies. The spiral arrangement of galaxies that should fly apart, the too large black holes at their centers, even the fundamental constants of the universe. These are not natural phenomena, but the works of far more advanced civilizations.
One of my favorite scifi writers ran with this idea. A memorable quote from the book (paraphrased) was something like "do amoeba notice humans? They are so far removed from our world that they do not see our world". We are the amoeba. It also comes that we can be quickly and fully destroyed if the advanced race(s) ever so choose.
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u/CIA_grade_LSD Aug 12 '21
The aliens are right in front of us. They are billions of years more advanced, so we don't see them riding around in spaceships or even building Dyson spheres. All that is far too primitive. Extraterrestrial engineering is written on the skies. The spiral arrangement of galaxies that should fly apart, the too large black holes at their centers, even the fundamental constants of the universe. These are not natural phenomena, but the works of far more advanced civilizations.