Given how jaw-droppingly insane the latest Indiana Jones movie was, you'd think that nothing from it could actually be historical. But crystal skulls aren't just some hacky screenwriter's brain-booger, they are a real-life archeological puzzle. Many crystal skulls have turned up at auction over the years, and they've long been rumored to have originated in Maya and Inca civilizations. People have some seriously whacked out attachments to them and their supposed ominous powers. However, the science says these guys were produced in the 18th Century, and science is a pretty convincing talker. The truth is that we have no clue who made them, even if they are a hoax. We just know they're weird and in museums now.