1865 ghost photos were even spookier in their original 3D - Mashable
http://mashable.com/2016/07/26/stereoscopic-ghosts/These 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 ...
Submitted in section: Paranormal news 2015: 1865 ghost photos were even spookier in their original 3D - Mashable