Tonight's documentary is dedicated to a very particular bird, which walks upright and does not fly in the air but under water: the penguin. Despite its funny and slightly awkward figure, it is a champion of natural selection. We see it adapt to an extreme environment, the Antarctic continent. As always, there are numerous reports and columns: until a few years ago, the media attention was monopolized by the problem of AIDS. Now, the problem seems to have almost disappeared. But is it really so? An update on the situation. In Priolo, Sicily, from an original idea by Nobel Prize winner Carlo Rubbia, developed by Enea engineers, a power plant for the production of electrical energy that uses thermodynamic solar energy is being built. Enormous towers of light to be able to imagine the archaic skyline, full of vertical elements and ancestor of the contemporary metropolis.