Two former members of The Police are reuniting - not for a concert tour, but for a new BBC documentary Sting and percussionist Stewart Copeland will sit down for a two-hour conversation about music as part of the BBC project "What Is Music and Why?" Copeland says the doc is about "the evolutionary purpose of music" and "how much it controls us".
Other artists appearing in the documentary include Patti Smith and Bobby McFerrin. Francis Ford Coppola appears to discuss using music in film.
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