Story : Extraordinary finds have emerged such as a pipe organ that archaeologists have reconstructed, allowing us to hear again the sounds that the Romans liked. Michelangelo Pepe visited the port of Rotterdam. Founded in the fourteenth century, it is still the largest port in the world for goods movement. Directly connected to the Rhine, the port is characterized by spectacular bridges and tunnels. The nature documentary deals with much-loved mammals: elephants. The mysteries of their bodies, the territories in which they live, their eating habits, and life with their young are described in every aspect. Piero Angela's guest in the studio is Emilio Previtali, champion of an extreme sport, freeride, that is, the descent from high and impervious peaks with a snowboard. Previtali describes the techniques and secrets of this sport and explains how avalanches can be caused with reckless behavior. Two extraordinary journeys: Superquark goes back in time to the Middle Ages.