The fourth episode, airs exceptionally on Saturday. This time the Ushuaia crew will show us areas near us, in particular the hidden beauties of the island of Mallorca and the Pyrenees. But also, and above all, Nicolas Hulot will make us fly in the sky with the griffons. Caltech, or California Institute of Technology, the private university in Pasadena founded in 1891. One of the most awarded universities in the field of research. 2200 students, 300 professors united by a passion for study and strict rules of honor, are the protagonists of one of the most elite universities in America, which has counted among its professors great names such as Albert Einstein and which has produced, to date, 31 Nobel Prize winners. In the report by Barbara Bernardini and Marco Visalberghi. The arrival of microelectronics has coincided with the birth of a large market: the enormous increase in elderly people.