Here are my opinions about UFOs and related topics:

Although the vast majority of UFO sightings can be explained by ordinary causes, there is a small percentage of cases that remain unexplained even after serious investigation. The most reasonable explanation for these specific cases is that they involve spacecraft from other planets.
Based on the variety of UFO shapes, as well as the different types of beings reported near landed UFOs by witnesses, it is reasonable to conclude that multiple alien species are visiting Earth. Each species operates its own kind of craft.
Since there is no evidence of hostile actions against humans, the best explanation for alien visitation to Earth is that the aliens are here with the goal of monitoring humanity and studying its long-term development.
The Roswell incident was the genuine crash of an extraterrestrial craft, but it was the only one of its kind. All other alleged UFO crashes — such as the ones claimed to have occurred in Aztec, Kingman, or Kecksburg — have plausible terrestrial explanations.
Although alien bodies were found at the Roswell crash site, none of the occupants of the craft survived the crash. Stories about live aliens being interrogated or kept in secret facilities are part of the disinformation surrounding the event and lack credible evidence.
The U.S. military-industrial complex has attempted to reverse-engineer the alien technology acquired through the Roswell incident, but the reverse engineering has been unsuccessful so far. The technology involved was so advanced that they were unable to understand its functioning and could not replicate it.
Alien abductions are an Earth-based phenomenon. The vast majority of abduction experiences can be explained through psychological mechanisms such as sleep paralysis, false memory formation, or cultural influence. The remaining percentage of reports can be plausibly attributed to covert human experimentation involving mind-control technologies, similar to those studied in the MK-Ultra program.
Cattle mutilations are an Earth-based phenomenon. The vast majority of cattle mutilations are caused by natural processes such as predation, disease, or environmental factors like insect activity. The remaining fraction of cases may involve covert human experimentation, possibly for biological or environmental monitoring purposes.
There are no alien bases hidden beneath the Earth or under the oceans. Stories about underground alien installations in places like Dulce, New Mexico, or underwater alien structures in remote parts of the ocean are based on hearsay or deliberate hoaxes. No verifiable evidence has ever been presented to support the existence of such facilities.
There has never been any credible contactee. None of those who have claimed to be in regular contact with aliens from Venus, the Pleiades, Sirius, Arcturus, Lyra, etc., has ever provided credible evidence to support their story.
In some cases, during a UFO sighting, witnesses have reported hearing voices in their heads saying things like “We will not harm you” or “Stay where you are.” These cases are not fabrications. However, there is no spiritual or natural component to these interactions. Rather, they are simply the result of advanced alien technology interacting with the human brain. Telepathy is not an intrinsic characteristic of alien biology and has no metaphysical cause; instead, it is enabled through the use of advanced technology.
The Ancient Astronaut Theory is incorrect. Ancient civilizations developed entirely on their own, through human ingenuity, observation, and effort. There is no credible evidence that aliens intervened in the construction of ancient monuments or guided the development of early societies.
The gods described in mythology were not visitors from space; they were imaginary characters created by humans to explain natural forces. Those who interpret ancient legends as evidence of extraterrestrial intervention in ancient history are simply engaging in retroactive reasoning, projecting contemporary concepts onto ancient cultures.
Even though there is no evidence that extraterrestrials established direct contact with ancient human civilizations, it is still plausible that alien visitations took place in the distant past. For example, some of the strange flying objects reported in ancient times — such as the so-called “flaming shields” seen by the Romans — might have actually been extraterrestrial craft. That said, any alien visitation to Earth back then was probably much less frequent and much more discreet compared to what seems to have happened since 1947.
Building on this line of thought, it is conceivable that the extinction of the dinosaurs was artificially caused by an extremely powerful alien weapon. According to this idea, the weapon was fired from orbit, and the crater now visible in Mexico — which is commonly believed to be the result of an asteroid impact — might actually be the lasting mark left by that alien strike. This theory is not mine. I came across it online, and even though there is no evidence that it is true, I still find it fascinating and worthy of consideration.