Free 5 8 business day shipping within the us when you order 25 of eligible items sold or fulfilled by amazon. Robert provine about robert teaching curriculum vitae publications research books laughter a scientific investigation curious behavior yawning laughing . Drawing upon ten years of research into the most common yet complex and often puzzling human behavior dr r provine the worlds leading scientific . Laughter a scientific investigation by robert provine phd drawing upon ten years of research into this most common yet complex and often puzzlin. Laughter a scientific investigation kindle edition by robert r provine download it once and read it on your kindle device pc phones or tablets use features
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