What if advanced alien civilizations exist and the Milky Way is just "protected land" in one large alien empire which is observed from a distance to remain hidden? Any forms of contact are blocked off from the alien public and made difficult/impossible with their jamming technology, especially physical contact with barriers to whatever kind of travel they use.

Kinda similar to the many protected tribes on our planet which we don't contact such as the Sentinelese. Every once in a while some idiot will make contact and the government will quickly extract them to prevent endangering the tribe or the idiot themself.

This may explain all the UFO sightings over time. Essentially, some alien **** trespasses and their spacecraft is spotted by us only for the alien ****'s government to immediately remove them and purge most if not all evidence (which our government would probably hide if they had it anyways). That or it's an agent of the alien government observing us up close for whatever reason, then quickly leaving.

you know too much

....

No sorry brah just a Belieber

Why is it that UFO sightings go with the times? For example, people claimed to see chariots in the sky in the past. Now, it's saucers and stuff. Why?

That being said, I have absolutely NO IDEA wtf this is.

Spoiler!

We will probably never know. Extraordinary claims require extraordinary evidence though. Either the aliens are so advanced that they can hide an entire planet from us or travel extreme distances very quickly (we are completely fuked if this is the case) or perhaps our entire understanding of space and time is wrong. IDK. All I know is there are things even about our solar system that we don't really understand. For example, there is a gravitational anomaly that suggests we should have another planet. That planet is supposedly really far from the sun...too far to support life as we know it, and yet we can't see it. It is believed there is a primordial black hole out there right on our doorstep. Our understanding of science is always changing. I won't presume to say we have never been visited by aliens or that they cannot exist. I will simply say we do not know. It is unlikely that aliens will ever visit us given what we know about the universe. But what we know about the universe is really still in its infancy.

Please note that a UFO doesn't necessarily mean alien. That could have been a manmade craft or some sort of anomalous atmospheric or optical effect. As far as aliens being out there somewhere, absolutely. There's basically no chance that Earth is the only planet where conditions for life existed. The possibility of life, being a physical process, can and should arise anywhere in the universe where the conditions allow it.

Humans try to explain the unordinary with the ordinary. Makes sense that they would try to interpret the unknown using whatever technology or religion they knew.Seems likely tbh. None of those tribes could fathom the ability to travel the entire world in a matter of hours, hell, they probably couldn't even comprehend a world outside of their island. We could completely extinguish their race if we wanted to, but our civilization has matured to the point where we wish to protect them instead as if they were an endangered species. The Jarawa was on a neighboring island to the Sentinelese, and apparently the Japanese bombed them during WW2, chit must have been terrifying and completely unexplainable by them (except maybe through religion).

Whatever it is, our existence is definitely weird and not explainable by our current understanding of the physical world IMO

Another reason we might not see aliens is that there are several potential ways intelligent life could annhilate itself. Nuclear or biological warfare, atmospheric change, creation of negatively charged strangelets (assuming they can exist and larger are more stable than small ones), or possibly something even more catastrophic like gravitational warfare. Maybe most intelligent life tends to destroy itself. It's certainly a very unstable equilibrium and as we keep getting more advanced technology, eventually the stakes will get really high.

It's interesting to realize humans have existed for like 300,000 years in a stable but harsh way. Yet, in the last 500 years or so, we very rapidly expanded our technology. It seems like we won't last another 2 centuries tbh. We were probably better off without any technology, living simple lives. Agriculture likely was the beginning of the end.

saw ad astra and sorry op we are alone

As if Trump would let that happen.