" The Seeds of Speech:Language Origin and EvolutionHuman language is a weird communication system:it has more in common with birdsong than withthe calls of other primates.Jean Aitchison explores the origins of human language andhow it has evolved.She likens thesearch to a vast prehistoric jigsaw puzzle,in which numerous fragments of evidence must beassembled.Such evidence is pieced together from a mixture of linguistic and non-linguistic sources like evolutiontheory,archaeology,psychology,and an