>>11727352This is indeed a problem. There are indeed unexplained craft with exotic propulsion systems seen today and throughout history. This is all on record. Enough geneticists have stated that our DNA had been artificially manipulated in the past to also raise questions. Ancient religions also point to this as happening and are the origins for the human species, most notably Babylonian mythology. Almost all ancient religions claim the 'gods' came from the 'heavens' (outer space not the biblical 'heaven') and brought us technology and civilization.
In conclusion: Are there aliens and do the visit?
Short answer: Yes, it is mathematically impossible for there not to be other life somewhere out there. But is there intelligent life and is it visiting us? Who knows? Are they even 'mundane' life forms or extra dimensional beings? Again, Who knows? Anything is possible if the universe/multiverse is infinite. . .