Transcription: When we talk about the universe and the fact that we are all beings, we must be clear about what a theory is. I would like to say that a theory of a model of the universe or a sign of time, is a way of making the most of the models of our own imagination. A theory existed in our own hands and no one could ever understand what was happening. Here is a small example. A name of the Wissenschaftler, you see, Bertrand Russell, is called an often-discovered astronomy.