The Grateful Dead was an American rock band formed in 1965 in Palo Alto, California. Ranging from quintet to septet, the band is known for its unique and eclectic style, which fused elements of rock, psychedelia, experimental music, modal jazz, country, folk, bluegrass, blues, reggae, and space rock, for live performances of lengthy instrumental jams, and for their devoted fan base, known as "Deadheads". "Their music," writes Lenny Kaye, "touches on ground that most other groups don't even know exists." These various influences were distilled into a diverse and psychedelic whole that made the Grateful Dead "the pioneering Godfathers of the jam band world". The band was ranked 57th by Rolling Stone magazine in its The Greatest Artists of All Time issue. The band was inducted into the Rock and Roll Hall of Fame in 1994 and a recording of their May 8, 1977 performance at Cornell University's Barton Hall was added to the National Recording Registry of the Library of Congress in 2012. The Grateful Dead have sold more than 35 million albums worldwide.