Overview: The new episode of "Noos - The adventure of knowledge" starts from the Basilica of San Clemente, one of the most evocative and historically rich places in Rome: Alberto Angela descends into the oldest layers of the building, where every historical era has left its mark, to discover the first basilica dating back to the fourth century, and even deeper where archaeologists have discovered a temple dedicated to the god Mithras. A report filmed at the Santa Lucia Irccs Foundation in Rome illustrates new scientific research on Alzheimer's. The cameras of "Noos" also went aboard an offshore patrol boat of the Navy, engaged in the defense of large underwater infrastructures, from internet cables to gas pipelines. And again, the focus is on the natural forest of Vallombrosa, in the Tuscan Apennines, to better understand the role of forests in the future of our planet.