Armchair scientist: Aliens are really unlikely, unless we simply misunderstand physics. When we consider that it takes light 4.3 light years to reach the closest star--that is it takes 4 years for freaking light to travel to the closest non-planetary star! And if we accept Einstien's notion that as matter approaches the speed of light, it becomes energy--and can essentially travel no faster, this is hard limit--and more, an ability that we can't even hope to accomplish with our current power or theoretical power sources, it seems very unlikely for Aliens to come visit. It would require inter-generational space ships and a real commitment to get here, or technology that defies the physical reality as we know it (wormholes, etc.) which seem totally corny and hairbrained. Possible? Sure. Possible like invisible unicorns are everywhere kind of possible. (List of possible habitable planets found here, look at the ly (light years) for context) (A neat aside, is that if we think about how long it takes light to travel, that every thing in the night sky is historical, non-current, we are literally looking at the past--so a star 3000 light years away, we see it 3000 years in the past! Cool stuff!). As for the supernatural, well, I haven't experienced anything close to such, at least, sober. The idea of ghosts, seems far more sad, than depressing; it's difficult for me to believe in any afterlife, much less one that traps some people to roam our material world.