A native holds a snake in one of the primary forests of the Amazon rainforest. Whether huge giant anacondas and boas, stories about the existence of giant snakes in the huge "green hell" of the Amazon basin are repeated since shortly after the arrival of the conquistadors and Spanish and Portuguese explorers, but it was not until twentieth century that were the first collections rigorous encounters with these beasts. In the late forties, the director of the zoo in Hamburg, Lorenz Hagenbeck was the first to study thoroughly the mystery, to understand the extraordinary events that took Victor Heinz priest while visiting the Amazon River in a canoe. The first one took place on May 22, 1922, near a town called Obidos, when only thirty feet away was a huge snake that was carried away by the current. The crew stopped rowing, trembling with fear at the enormity of the animal: twenty-five meters long and thick speech recovered, they said, still frightened that we would have crushed the serpent as an ordinary matchbox unless by the happy coincidence that at the time he was quietly doing the heavy digestion of some good fish dinner. " A few years later, on October 29, 1929, he met the priest again with a giant snake in the same river. It was near midnight when he saw their oars in terror, rowed toward the shore shouting that there was a huge animal. "At that moment I saw that the waters were removed as if it were happening on our side a large steamer and watched a few feet above the water, two blue-green light lights like a riverboat position." When he tried to reassure his men telling them that it was a ship to depart the boat of his career, they replied that it was a giant snake.