I've been thinking. I decided to write one really serious topic. Those who have read my previous topics know that sometimes I have written humorous topics. Now you will understand why I did it. I see a lot of people here who understand the sciences or are interested in them. Sorry English is not the language of my country, I don't know it well and I have a little dyslexia. If you don't understand me, just ask me again what I wrote. If you don't understand something, then write what you don't und