Ulisse will deal with another important theme: that of gravity. Above all, we will try to understand what are the consequences and effects of the force of gravity on the earth and how we are continually forced to challenge its laws and fight them. In the episode many curiosities that will show us the various ways to face and overcome the effects of the force of gravity in the various sports disciplines, in the construction of skyscrapers, in space. Alberto Angela will explain all this to us and will also climb the Tower of Pisa to retrace the experiment carried out by Galileo Galilei to study the phenomena of gravity.