As far as we know, Music as an art form exists nowhere in the universe apart from in the thin band of atmosphere around a small rock, orbiting a minor star, at the end of an arm of a minor galaxy, which itself is merely one of miriads. In geological time, it has been present for only a moment. The communication and perception of this art form is not tangible and exists only in a small part of the human cognitive organ. I believe it to have evolved from the communal, territorial howlings of our far distant ancestors and on its journey from these territorial displays to its present ethereal state, its generation has moved from testosterone producing areas to the serotonin.