1865 ghost photos were even spookier in their original 3D

Image: London Stereoscopic Company/Getty ImagesThese images of ghastly spirits spooking the wits out of people were created by the London Stereoscopic Company and sold as stereographic cards which, when viewed through a special viewer, became remarkably sharp and eye-popping three-dimensional images.The ghostly figures were achieved using double exposures and other photographic trickery — an impressive level of technical mastery for the still-young medium of photography.Though th