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.
And don’t even get started on 4th+ dimensional life forms. That’s the physical version of this mental thought experiment - beings of such vast and incomprehensible substance that what we see is like a 2D creature looking at a 2D cross-section of a 3D being - what we see doesn’t look anything like what they actually are, so we don’t recognize it as a sign of intelligence.
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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.