My beliefs, I believe there is other life out in the universe but we will never meet them as the universe is too massive. If our solar system is a grain of sand on Smithville lake, and the nearest other Galaxy is in Iraq. The odds of two intelligent life species find each other is nil.
Now, for ufo sightings. I don't think they are aliens. I think they are time travelers. If travel is possible it would need to be done via a ship as the universe expands and moves. Needs to be a beacon of some sort. The reason they don't look like us is evolution from living in space or altered earth environment because we destroyed it.
Just my crazy theory.
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