While I think the UFO enigma indicates some form of intelligence, I'm not sure where that intelligence originates. Certainly it could come from the interstellar neighborhood -- but the evidence, taken in its entirety, suggests we're dealing with something substantially stranger. (Of course, we could be confronted with myriad overlapping phenomena.) In any case, we'll likely never know until the rigid definitional framework that has come to dominate discussion of all things "paranormal" is relaxed to accommodate a genuinely agnostic approach.
Sagan and the Hill encounter
UFOs: Why no "open contact"?
UFOs, aliens and consciousness
The Roswell controversy
The persistent myth of UFO "disclosure"
The "Grays" as posthumans
Do aliens smoke cigarettes?
Talking flowers and other denizens of the imaginal realm
Little green men
Asemic texts and "alien" writing
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