What if our universe is a small sphere among billions of others...?
I used to believe that the UFO phenomenon was aliens visiting from other galaxies monitoring us in preparation for an attack. But after seven decades the attack hasn't come, and the question has to be if they are extraterrestrials, what could they be up to? If they were from other planets with intelligent life, they would have to be a very, very long distance away from home--mind-bogglingly distant. All the expense and monumental logistical difficulty of coming here just to engage in furtive covert surveillance of us without ever openly manifesting themselves to the governments of the world such as happens in the movies, but only to small handfuls of obscure people (close encounters of the third kind)? What would be the point?
One thing unsettling for a believer in extraterrestrial UFOs like I used to be is that in the 1890s many people saw UFOs complete with strange-looking aliens in crafts that were (if my memory of my reading of these events is accurate) extraordinarily primitive compared to the UFOs that began to be seen regularly in the 1940s, crafts that could never have delivered beings to this planet from other worlds.
The UFO phenomenon puzzles me. I see no evidence it is good and some evidence it is evil.
Stop it you are scaring everyone.Attacking via an army is a "human" thinking. Aliens have different psyche. Maybe they attacked us already with imperceptible methods. remember, if they attack us is for our planet and her resources. So better wipe the inhabitants without altering the planet.
uncurable diseases, atmospherical hazards, planet heat modification.
If those aliens have extremly long lifespan, time is not an issue , they can wait centuries...