I’m pretty certain Theres are lots and lots of alien civilizations in a universe the size of ours. I’m also pretty certain none of them have ever been here or ever will be. The size and expanse of our galaxy and the billion or so other galaxies are just too immense for comuting..
What exactly is an ‘alien’?
We know that because we most certainly know everything there is to know about physics.
Yet we’re send probes out, landed on Mars and flying and driving all over Mars.
Voyager 1 Key Milestones:
Launch Date: September 5, 1977
Jupiter Flyby: March 5, 1979
Saturn Flyby: November 12, 1980
Entered Interstellar Space: August 25, 2012 (so it’s been interstellar for 14 years)
It’s 15.8 billion miles from earth and still communicating.
As for commuting, another life form may have figured the distance/time thing out...or maybe billions of light years for them is a few minutes in time for us.
Think outside the box... For some reason folks base their idea of aliens on physics as we understand it and in the big picture we don’t know what we don’t know..