Is it just me, or is the concept of an "unsolved mystery" redundant? A solved mystery is an oxymoron, which is precisely what we're going to get into. One of my favorite recently solved mysteries is the identity of the Zodiac killer. The fact that there was a guy walking around for years who looked so much like the sketches baffles me. My favorite part of this whole ordeal is that one of his friends posted a picture with him on Facebook with the caption “Zodiac?” and nobody even noticed. I know…