Oh wait! I got it. I talked to my friend, who knows way more about archaeology than I could ever hope to and she explained to me that a lot of individuals use artifacts without even trying to contact the group who has ownership of them. Wow. This seems like a major problem. :( I guess when I think of a lot of things that I've seen in museums, I never really considered how many of the items were stolen by archaeologists and historians. :( I'm sorry if I bothered you with my stupidity.