What is the human being? A subject so vast, surprising, constantly renewing itself... that there is a laboratory museum, the Musée de l'Homme, to try to answer it. But if to analyze, decipher, grasp the human species, we have long apprehended it as we study other species, can we look at it differently today? Because the singularity of Man is conceived in all its complexity. Scientists and personalities from all walks of life question the place he occupies in the living, to discover one of the great mysteries that offers itself to Man: Himself.