If I were to make a decision, I'd go for "intelligent ET on this earth" because the mechanics and physics of "travel from the stars" is simply against the odds, as I tried to show in my previous articles. I can see myself one day believing in an ET entity hiding somewhere until up this point on earth then accepting 10,000 year long space travels through all kinds of asteroid and radiation belts, and this happening thousands of times each year. I find that possibility just too incredible to believe. So yeah, let's say there is a little green ET guy or colony under some mountain or ocean who are messing with us without getting detected, or in cahoots with the big governments. I'd take that as a "working hypothesis" but not conscious beings flying back and forth from Proxima Centauri B.