The Seeds of Speech: Language Origin and EvolutionHuman language is a weird communication system: it has more in common with birdsong than with the calls of other primates. Jean Aitchison explores the origins of human language and how it has evolved. She likens the search to a vast prehistoric jigsaw puzzle, in which numerous fragments of evidence must be assembled. Such evidence is pieced together from a mixture of linguistic and nonlinguistic sources such as evolution theory, archaeology,