Keeping that in mind, let's study for a moment people who want to believe that aliens have traveled here to Earth from some distant place where they evolved completely separate from us. These accounts nearly always include some version of what is called the grays. Below is one abductee's drawing of a gray:
Have you reached the problem yet? Maybe you have. If DNA evolution is a series of proofreading errors that culminate in the finished product (and it is, just saying) then there is no way whatsoever that aliens from another universe or even a new species evolving on this plant would ever look anything near like us. Now, have another look at old gray ass up there. Arms, legs. Check. Feet, hands. Check. Even the structure of the face - the location of the nose, eyes, mouth - are all far far to similar to that of our own species to make any report detailing an alien looking anything like this to be anything more than a super-sized order of bullshit.
The only way this sketch and the sketches like this one are to be thought of as anything other than bullshit it must be assumed that these "beings" originated here on this planet and are from the some string of DNA as we started from but only deviated dramatically at some point. Any other proposal don't hunt, as they say.
Think of dinosaurs, to further explain this. Now there was a species that did originate here on Earth but in an entirely different DNA strand as ours. Thus, and very predictably, those fuckers look a million times different than us, were a million times different than us. The series of proofreading errors - the distinct and exact set of errors in the same exact sequence - was not matched perfectly when we crawled from the natural heating vents and toward land. The end result: we are nothing like dinosaurs.
Maybe I'm completely insane, but I don't think so. I think my very limited understanding of science and biology has led me to a logical conclusion that changes a few things, at least as far as grays are concerned.
Even with this logical evidence, at the end of a long day, though, it is still my own personal thought that every single alien encounter of any kind has been an encounter with our own vile government as part of a perpetuated plan unknown to its citizens and for a never-to-be-known purpose. How's that for goddamn crazy as all hell.