That practice then developed into music. No evolution there. Cute, but dead wrong. Trehub travels the globe, studying mothers as they sing to their children. No matter where she goes, people sing to their infants the same way, at a high pitch, in a slow tempo and in a distinctive tone.
Every culture has lullabies.
They are so similar that you could never mistake them for anything else. That suggests to her that music is no human invention. If we all use music to communicate with infants, maybe it arose as an instinctual form of communication between mother and child, a way of forging an emotional connection. Music would have been adaptive because mothers who were better musicians had an easier time calming their babies, Trehub suggests. Their cries would not attract predators, they and their mothers would get more rest, they would be less likely to be mistreated.