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Originally Posted by Mull
Regarding the concept of aliens existing or not, doesn't it boil down to 3 options?
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No. There are dozens of theories about alien life and why we have never made contact. You can't swing Schrodinger's cat without hitting any one of these theories, some of which have already been brought up in this thread. Some of the popular ones I like to ponder.
Zoo hypothesis: Aliens refuse to contact us because of our current state of evolution and instead observe us as we would observe animals in a zoo. Like field researchers alien life forms may employ means to prevent us from seeing them, like a hunter would use a blind to hide their presence to their prey. I like this one and believe that if ET is visiting, they do so carefully and from their blind.
Laboratory hypothesis: Aliens use earth as a giant laboratory to conduct experiments. Humans are but another animal (we are) they consider something to observe and run tests on. I can get behind this one as well. We take a similar approach as we probe other planets in our solar system.
Prime Directive hypothesis: Aliens follow a rule of non-engagement with species not up to their technological or evolutionary levels. The earth may be a refilling station in the cosmos for interstellar travelers, but they make sure to get what they need and go without interaction.
Planetarium hypothesis: The universe is an illusion created by advanced civilization, manipulating energy and matter on a galactic scale, to give the appearance of it being empty of other life. In essence a big stage set has been built around our solar system to keep us contained.
Simulation hypothesis: We are living in a simulation created by a superior intelligence and it is observing the simulation as it takes place.
Aestivation hypothesis: Aliens are in a state of hibernation, allowing their technology to store energy as the universe cools and letting them take on larger tasks when they awaken.
Rare Earth hypothesis: We are unique and alone. Math seems to make this unlikely though.
Great Filter hypothesis: There is a barrier to development that makes detectable extraterrestrial life exceedingly rare. I actually agree mostly with this. There needs to be an intersection in ET's and our technology for us to detect each other, and that intersection will be fleeting. Of we are doing things remotely, there needs to be a common link between our technology or we will never see the connections.
Brief Window hypothesis: Kind of like the great filter, but based on the time civilizations exist and there being a window when the two may exist at the same time with the technology to communicate.
Transcension hypothesis: This suggests that rather than exploring the outer space of the universe, advanced civilizations explore their inner space at nano scales and eventually disappear from our view.
Ocean Worlds hypothesis: Aliens may be flourishing within the interior oceans of the moons of the gas giants and may be trapped there. It is possible that those aliens are already here in our oceans, and we have not yet found them.
Aurora hypothesis: Our biome may not be compatible with an alien life form and they just pass us by.
There are lots of others. Personally, I think we are being observed just as a scientist would observe their subject of study. I think we are not even close to the point in our evolution where an advanced civilization would consider reaching out to us. We are the most violent and self-destructive creature on this planet. We go out of our ways to create new and crazy ways to kill each other. We also do incredible damage to the very planet that gives us life. We are destroying the environment we need to sustain ourselves and further our species. If you observed any of this, would you reach out to that civilization or wait for them to get their #### together?
I believe, on a galactic scale, humans are viewed as a toddler. We don't have control over our own impulses, we don't have an understanding of the environment around us, and we definitely do not understand the universe. We put everything into our context, which may be incompatible with that of other life forms. Humans live 70-80 years on average. What happens if other life forms live hundreds or thousands of years? What type of game changer would that be? We think we're king #### of the universe but look at our existence and behaviors. Do we really behave like an "advanced civilization"? I can see why aliens would do everything in their power to stay hidden from us. We aren't ready to join the galactic community.