To circumvent state censorship in the Soviet Union in the ’50s, a few inventive music fans started to produce makeshift LPs etched into used X-rays. Those records where fully playable and easy to smuggle across the borders. Stephen Coates, an obsessive collector of this so-called “bone music,” has published a new book entitled X-Ray Audio: The Strange Story of Soviet Music on the Bone, which documents the strange stories associated with these recordings. Find out more over at NPR and check out some more weird formats we found on discogs here.