No, that is not an "answer", that is a "theory". An entirely unsubstantiated and somewhat delusional theory at that. How is it any better than this theory (thanks Piscivore for the inspiration)?
*Bob's Bigfoot Theory*
Bigfoot are invisible. But, they didn't start out that way. Bigfoot, you see, are people... sort of. You see, there is this mysterious disease called
"Mogellons" that many people, primarily in Northern California, have come down with. Initial symptoms are a general malaise, an "out of body" sensation and strange fibers growing out of wounds that don't heal properly. What the government is covering up, however, and what LLNL has been studying all these years, is that these are just the preliminary symptoms to a very horrific disease.
Morgellons causes human DNA to mutate, causing victims to slowly transmogrify. The final stage is an invisible being, frightened of light and of contact with humans. They live a silent, invisible and naked existence on the fringe of human civilization. Very little more is known because they are near impossible to study.
However, leaked reports suggest that LNLL was studying invisibility for the DoD in the early 1970's. Fixtures and data had been moved to LNLL from Philadelphia for this research. They called in Hawking as an expert, but he quickly distanced himself when he realized the researchers had unwittingly unleashed a dreadful disease on the populace.
So, this is why the government works so hard to cover-up bigfoot evidence. Bigfoot is not a scary ancient creature or an ET, Bigfoot is humans transformed beyond recognition by government bufoonery driven by an unquenchable lust for military might to defeat the evil commies.
As evidence, I offer
this irrefutable proof.
*End Theory*
So, tell me, Histo, what exactly are the holes in my theory? Does your theory explain anything better than mine? Are there things mine explains better (hint - the government cover-up bit)?