Avant-Garde Jazz covers a wide number of experimental developments within the last forty years. Counted among its sub-genres are Third Stream, the fusion of jazz with modern classical music, and Free Jazz, epitomized by the wild sax playing of '60s legend Albert Ayler. More recently, eclectic composers such as Chicago's Henry Threadgill and New York's John Zorn have forged wild new hybrids, giving form to the open-ended spontaneity of Free Jazz while incorporating influences from Funk, rock, and world music. Countless other musicians from around the world have helped Avant-Garde Jazz continue to grow and mutate.