Interesting. I ended up here on a search for Julio Miguel Guerra - from a sighting in 1982.
I read Leslie Kean’s book on the subject recently after having a thought the caused me to think about alien visitation again. Until then, I had dismissed it entirely as nonsense.
What caused me to rethink the possibility is the program we have now where we are indirectly observing planets around other stars. We can infer their atmospheric composition, size, distance, temperature and so on using very primitive equipment.
If we had much more advanced equipment - say observational equipment hundreds of thousand of times more sensitive, we would be able to identify distant planets with the potential for life to very fine detail.
Here’s the interesting thing about that. Earth could have been easily identified as a good candidate for life 2.5 billion years ago - Before that, probably, but surely for the last 2.5 billion years it’s been a lush place, albeit devoid of meaningful life until 500 million years ago
A lot of previous ideas on alien visitation were based on the idea that aliens might visit the planet after receiving intelligent electromagnetic waves from Earth - thus showing our ‘technology’. This requires super luminal speeds and can be dismissed. If, however, Earth was observed a billion years ago as a good candidate for life, then another civilization would have plenty of time to send a robotic vessel to investigate.
So, I’m open to the possibility as it does not require amazing technology
But this would lead to the following conclusions if such a vessel visited
1) It would be a robotic vessel. It would not contain biological pilots - just as we would not send our pilots on a 200k year journey. It’s just impossible to imagine for many reasons
2) The robotic vessel would be on a one way ticket. It would likely not be sending any messages back home or have any plan to return home
3) It might have intelligent robots of some kind, and it’s hard to figure how they were programmed, but I have to think it would just come and land
This backs us into a corner a bit. We sent the Voyagers on one way ticket out of the solar system, and they do send transmissions, but would we send a robotic vessel on a one way ticket. How could the cost be justified?
A lingering question.
As far as the observations of UFOs. If you investigate these, you can dismiss most of them straight away. The only ones that interest me are military sightings or sightings by people who have a lot of responsibility in their government.
And by people who are well trained with no prior interest in UFOs - who have an encounter that cannot be ‘jupiter’ or ‘mercury’. If you throw all of the ones out that do not meet this criteria, there are still many dozens of sightings left. And many of them cannot be dismissed easily.
They also cannot be simply chalked up as advanced US or Russian technology - such as the case I mentioned at the top of this post.
The only conclusion you can arrive at, given the detail of military pilots and other pilots and of mass sightings, is that they are simply lying. They go into too much detail for it to be a star or US jet.
In one case, the case of Halt (you can look it up as Halt UFO), I think he saw a lighthouse and cannot admit it. But there are many more that are not so easily shrugged off.
How many times have we been visited by robots - if we ever were? Maybe only a handful. Maybe only once. One of these sightings might be legitimate in modern times.
Then we are tasked with answering the question: where did the vessel go? Where else is there to go in our solar system? No where. All the action is here.
I think it’s ridiculous to invest a lot in eye witness accounts or blurry photos. There is no doubt about it. But it’s even more ridiculous to invest in 3rd hand accounts of events (a messiah) that happened 2000 or more years ago, yet many people believe in Jesus.
I think alien UFO hypotheses are less ridiculous than any religious belief because, if nothing else, alien UFO hypotheses can be falsified.