OK.... this was so intriguing to me that I had to post it, and let everyone know about it, even if it is one of those internet hoaxes, which, in this case, I do not think it is, even though there is weighty reason to argue that the whole thing is a hoax. Well, if so, I claim my academic right to be wrong, and if I'm wrong, we can all have a good laugh at my expense and move on to other things. Anyway, here's the articles and the picture.
Now, what's interesting here is that apparently and allegedly the horned skull was found in Pennsylvania, and then it was "disappeared." Well, if so, whence the photograph? But let's assume for the sake of argument that the photograph of the skull is genuine. What would be the implications?
Clearly, someone had an interest in stealing the skull and it seems relatively clear why this was done. As one of the linked articles shows, horns were often used in art works to denote divinity or deity, or someone who had been touched by it. The standard interpretation being that such horns were figurative, symbolic of the "rays of light" emanating from the individual on whom they appeared. The appearance of an actual skull with such features, however, especially in the late 19th century, would have alerted "those in the know" that perhaps there was something to the idea of "the gods" mingling with men. All it would have taken is a quick glance at Genesis chapter six to conclude that the old story may not have been "just a story" after all.
But why steal such a skull? My suspicions here are nothing less, and nothing more, than speculative, and, again, are based on the methodological assumption of assuming the story to be true for the sake of argument and speculation. So here goes: (1) in the first instance, I think it would be necessary to steal such a skull simply to keep evidence of the history of the human race deliberately obscure. It would not do to have evidence confirming so many ancient texts and lore, and to have too many people inquiring into them. (2) In the second instance, and much more importantly, I think that it may have been stolen for deposit against the day that scientific techniques would have been evolved to determine its origins, i.e., against the time that DNA sequencing - completely unknown at that time - would be able to shed more light on the species origin (or origins), of such a skull.
Given all the other strange skulls that are known, the horned skull, with its long association with artistic symbols of deity, would be of inevitable interest to anyone seeking, through the human genome and cataloguing of haplogroups, of reconstructing a history of the human race and its migrations back through the mists of pre-history. We can, however, be relatively confident that if the results of such tests were ever released, the data would be as obfuscated as that of Osama Bin Laden.