You can't explain any of away.
One most certainly can.
First, where is the actual physical evidence of what you claim?
Second, where is the actual physical evidence of interstellar space travel, or even the physical evidence that it's possible?
Third, where is the actual physical evidence of any other lifeforms and that they have the ability of interstellar space travel?
And yet you wonder why you're considered a 'true believer' and a 'dunce'.