Is it just me, or has everybody noticed that there are certain shapes of faces that seem to reoccur? I'm Caucasian & I can't help notice that white people share a variety of similar facial structures. Perhaps its the same in other races, I don't know. I could be in one part of the world and see a face that has the same characteristics as someone I've met somewhere else. I'm not talking twins but similarities in bone structure and shape. Has anybody else noticed this peculiarity and what is the explanation?