As if we didn't have enough with frightening planetary sounds, artist Katie Paterson has recorded the chilling crackles of three Icelandic glaciers. Nothing special there... until you learn that she did it on 45rpm records made with actual ice.
Katie pressed the record against re-frozen ice plates instead of vinyl. Then she played them on two turntables until they melted over the course of two hours.
Update: Reader Wolfgang Oblasser wrote to say that Austrian artist Claudia Märzendorfer also uses ice for pressing records.