The very idea of “invisible” is a little hard to grasp. I’m not just talking about something that is really, really tiny such as an atom or an individual molecule of water, which are pretty much invisible to the human eye. What I want to talk about is something you should be able to see, but for some reason you don’t, and no, I’m not talking about stealth technology, or am I? I am not entirely sure what “invisible” means at all. The Predator can make himself “invisible” by turning on his high-tec camouflage, but that is stealthy technology that makes him hard to see, but he’s not really invisible. I think one needs to ask the hard question, can anything really be invisible that has mass? We know that a magnetic field is invisible, but it also has no mass. Light is visible and invisible according to its wavelength and the ability of the human eye to detect certain wavelengths. Again, for the Predator, other wavelengths are also visible, not invisible. Smells are invisible because the detectable parts per million are so small, we can’t see them with naked eye. If ghosts were real, they would be both visible and invisible at the same time. Certain bombers are invisible in the dark and even radar cannot seem them, but they aren’t really invisible either. Sound is invisible, and the wind is invisible, sort of. I think that it is both frightening and ironic that there are series of horror movies about men who have made themselves invisible, that the invisibility causes insanity and false grandeur. Even the tiniest bugs, amoeba, diatoms, and the like are only invisible because they are tiny and the human eye cannot distinguish anything at the atomic level. Love, or hate, are invisible, but then again, wild emotional abstractions don’t exist in the physical world other than as ideas, not as concrete realities. The closest thing to invisible in our world is the fictional cloaking device that exists in the world of Star Trek, which alters something at the sub-atomic level, changing the time phase of the object, rendering it invisible within its current physical frame and/or context. So I not only don’t know what invisible is, I also have no way of really describing it either. The actual physics of light reflecting off of an object so that said object appears invisible has yet to be truly defeated, except for the world of science fiction. None of this means, however, that we still aren’t working on it, albeit, clandestinely.