Check out this article -- in it there's an image that's easy to miss (on a computer screen, at least!) until you see the close up image. It appears to be a dog -- without ears? -- looking over the man's shoulder. The man believes it's a demon, and it looks fiendish enough that maybe it is an image of just that. Since I, and others do believe they exist but can't generally see them, I thought it was worth sharing. Here's the image:
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