The serious argument in this thread is found in message #19. For instance, say that the aliens found at Roswell looked like this:
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. . . And say they were circumcised (had a circular scar where the foreskin was removed). Since they're not from our planet, if they're circumcised, and have bloody crosses on their forehead, we can assume that some form of memetic, or symbolic (cross, circumcision) life-form (a trans-biological life-form) exists in the universe and has parasited the brain tissue of living organisms on more than one planet.
Well . . . as stated in message #19, we already know this to be true since aboriginal peoples who've never had contact with anyone outside their tribe, exhibit the same symbolism as found in Jewish and Christian ritual and symbolism. This suggests strongly that there's some kind of trans-biological life-form (a disembodied life-form of some kind) that's parasited brains thousands of miles apart and which have had zero contact whereby the memes or symbols could have reached them. It's as though they're floating in the air waiting to parasite brain tissue.
This being the case, I can venture a serious scientific theory that if and when we find intelligent biological life on another planet, some of them will be circumcised (or something equivalent) and some of them will sacrifice other living creatures in religious rituals. They will have temples where the blood of the sacrifice is taken and offered to the gods or God.
John