Tabla de Contenidos: “…-- The demands of parenthood : human life history and emotional development -- Making music together : the significance of cooperation and social bonding -- Neanderthals in love : "hmmmmm" communication by Homo neanderthalensis -- The origin of language : the origin of Homo sapiens and the segmentation of "hmmmmm" -- A mystery explained, but not diminished : modern human dispersal, communicating with the gods, and the remnants of "hmmmmm."…”