Plot: At the opening, with Nicolas Hulot's crew we will travel to South America among tribes that have preserved their ancient traditions with their villages and their shamans, who however are now facing a future with a strong capacity for attraction, but which is undermining their environment and their culture, first in Colombia and then in the heart of Brazil. While Barbara Bernardini and Marco Visalberghi went to California to UC Irvine to interview a group of researchers who are studying a group of "supergrandparents" who have physiological parameters equal to those of 40-year-olds