[MUSIC] Welcome to this third week of this course. I'm addressing to the survivors of, of the previous classes. And which wec, we'll try to understand the notion of, of feeling. And in, especially in this session, we'll try to, to, to answer to this question, are we going from nonsense to sense? And we try identify this, this question into a very specific living entity, bacterias. So, what are living entities? They're, first, physical entities. They're made of physical substances and because of, of the physical nature and because of a very specific way of encoding these, these physical substances. All living entities try to make very similar things. They try to survive, avoiding dangerous things or negative situations. They try to reproduce. We can discuss about the nature of, of viruses or not, but if they are living entities or not. But anyhow, they try to survive. They try to reproduce. They, at the same time, they try to receive energy supplies, that is, to obtain food, to add energy to their metabolisms. At the same time, they try to maintain the homeostatic equilibrium and they tie, try, they try to interact with, with the environment. So, when we look at the basic this distribution of life all across the, the living scenario are of the natu, nature. We can see that bacteria are at the base, at the, at the beginning of, of the evolutionary tree. And we are just an, in a, very late emergence of, inside, these, these change, this chain, sorry of living entities. But, what is like to be a bacteria? What are they doing? They chemical reactions with the world, the same time, they are prewired with chemical meanings. Because although they are living in, into dynamic dynamic environment, they are trying to obtain food and to avoid negative or dangerous chemicals concentrations. This is called chemotaxis. At the same time and without any really sophisticated mechanisms, they are able to make social interaction. And to communicate among the cells. In fact, they create colony patterns. So, we can identify communicative, cooperative, competitive and cheating activities among bacterias, it's incredible. And we are talking ab just about the, the most basic unit of, of life in our world. So if we think about which is nature of bacteria and we take into account that, that the, inside the human body, there are 10 times more bacterial cells than human cells. And that there, just in, in the, in the adult intestine we can identify more than 500 species of bacteria living in our intestines. Just imagine all across our body. Then if we think all these things into account, we can think on how the body has an intentional trend. And how really can understand that the complexity of some really sophisticated behaviors can be described by the emergence of more complex layers that, that can be derived from very simple rules. So there's always sense for our living entity that it's prewired. And at the same time, when we think on this very basic systems, we can ask ourselves, well, they can feel anything? The answer is very clear, no. And a plant, neither. But, just because they didn't have a more complex way of dealing with information, this will arrive with more complex nervous, ner, central nervous systems. Such those that we have in, in mammals and other kind of, of animals. But the point is, any living entity has a, a prewired way, and has an intention in, path into their body to interact in a specific way with environment. This is the basics to, for us understanding of, of what is an emotion and what is a value of finding information. Thank you so much, bye.
