There are two forms of aging There are two forms of aging 1988, 18:00 For Pianist with One Grand Piano and One Upright Piano Written for Kathleen Supové Premiered on August 12th, 1988 Kathleen Supové Paper airplane thrown at pianist Kathleen Sapové during the premiere of ‘There are two forms of aging’ at the Darmstadt Summer Courses 1988. Order Score