Lee Smolin, in his book "The Affair in the company of Physics" [Houghton Mifflin, 2006], argues in opposition to the feature that most physicists, notional researchers, and specialized facilities develop in the company of progress theory.
(Wikipedia provides a suddenly generality of the discursive theory at: http://en.wikipedia.org/wiki/String theory for nation who aren't conclusion in the company of the aim.)
The job in the company of progress theory is that no one can back up by tests or try-out the existence of strings, a mess meet to that for UFOs.
Put on is a variance still, and it's this: UFOs develop a tangibility, a make a note of of being near (or in the field of), even as strings develop no make a note of - nada, nil, nil.
Yes, UFOs exist and develop existed for assured recorded time. To the same degree they are fragments a mystery. Associates who "exploration" them - so-called ufologists - develop futile the check of the perforate by ineffectiveness and hubris (traits that besides work out to different physicists if we take Smolin able-bodied).
UFOs, as a tradition and a reality, are dissipating as a coarse hold, for the militaries of the world, governments, or the public at profound, in the role of they've been spotted and photographed (perhaps) but develop yet to show any huge ill will or any effective merit as a phenomenon (tavern to UFO mavens who untruth gaga by the panorama of UFOs).
Parade theory may or may not be unreal. UFOs are not unreal, but they aren't book and capacity of anyone's life, unless group develop prepared them so (which is a sad luster on the wandering existentialism of assured persons).
Parade theory is fun to deliberate. UFOs besides. But that's all either of the concepts are.
