We are in the era of the second humanity. There was one before, and there will be one after. In the Antarctic, paleontologist Charles Wells and his expedition discovered, at the bottom of an underground lake, the remains of human skeletons about 17 meters long. In Paris, his son David's project on human shortening has been selected by a brand new research program devoted to "the evolution of our species." Wells's father has found the ancient humanity, Wells's son sees the next humanity, but they are far from know the truth. Thanks to the support and passion of a woman, Aurore Kammerer, a specialist in the knowledge of the Amazons, they reveal the most surprising secrets and realize the craziest of experiences, forever changing the future of generations to come. This novel is followed by The Micro Humans and The Voice of the Earth by Bernard Weber to form the trilogy Third Humanity.