There is credible evidence of an ET/UFO connection. Lots of it. You either haven't looked into this issue very much or you are really jaded.
Oh well. The two of us won't lose much sleep over this because it really doesn't make any difference in either of our lives. If an ET presence ever becomes known and verified a lot of people will have some serious coping issues.
As far as electrons go, we know they exist in both forms as matter and as a wave so again there is proof of the electron, while there is no proof of ET life. So I really don’t understand your electron statement.
I guess I’ve just never seen any credible evidence of ET life anywhere. Where is this credible scientific evidence? I ask because I hear atronomers and astrophyscists all the time make the claim that humans have not yet discovered any credible scientific evidence of ET’s anywhere. So I really don’t know what you’re talking about. Unless you’re making the claim that because there are so many planets around so many stars that somewhere there just has to be life somewhere as being credible evidence. I would say this, my own personal gut feeling about life in the universe is thus: I think it probable that the universe is teeming with simple life where-ever life can survive, but I find the proposition that the universe is teeming with intelligent ET’s to be improbable because of the great filters life on any planet eventually must survive to become intelligent life. Remember, all of our knowledge about life comes from just one data point, and that is life on earth. Human beings are the only intelligent life in the universe we know of and the only intelligent life for which there is any evidence what-so-ever. Just sayin.