I really like the idea put forward here: http://www.meltingasphalt.com/music-in-human-evolution/ http://www.meltingasphalt.com/music-in-human-evolution/ And t

I really like the idea put forward here: http://www.meltingasphalt.com/music-in-human-evolution/ http://www.meltingasphalt.com/music-in-human-evolution/ And the research into the evolution of shoulders doesn't really contradict this.