Helen, as far as I know, all governmental and University experiments, civil and military, have given no results, or at least no better results than pure guess.

Scientist don't say that things don't exist, they only say that those things have not been proved. The problem is that many people insist in their existence far beyond all experiments in the contrary, so scientists finally get bored, archive those subjects, and dedicate to something more promising. When nobody can prove or disprove the existence of something, the discussion becomes sterile. However when somebody proves that his/her methods to explain the unexplained are intrinsically useful (for example a technique for the characterization of people through voice or gesture, or a new method for illness diagnosis) then THAT'S interesting.

Un abrazo - Andrés