Included: a musical number that can be performed by anyone on any instrument (John Cage's 4′33″); a fatal downbeat struck by orchestra conductor Jean-Baptiste Lully; Karma Dzong, a Buddhist shrine in Boulder, Colorado; Tibet; performance art (Tehching Hsieh); sculptor Duane Hanson; the development of commercial aviation; aircraft safety; an autopsy performed on a 2500-year-old corpse.