One of the world's oldest songs isn't about love, sex or even power. It's about death. Subscribe for new videos: http://bit.ly/cbcmusicYT Check out CBC Music: http://www.cbcmusic.ca Facebook: https://www.facebook.com/CBCMusic Twitter: https://twitter.com/cbcmusic Dies Irae, the song of death, is a medieval chant that warns of an apocalyptic day of wrath, and has been used as the soundtrack to the end of life for 40 human generations – from the dark ages to Star Wars and The Lion King.