Dear, you ask scientist Tesla a question when you get a chance. A very nice question, is he satisfied with his discovery? Then you say three discoveries are wonderful. Internet, electricity and vehicles are amazing inventions you have seen. Every discovery in science is amazing. Updated day by day to save people. But medical science seems to me a wonderful discovery. After the start of the corona virus epidemic in 2019, everyone has seen the desire of people to survive. Then medical science created wonders by discovering our vaccine. Without science, we would die for lack of medicine. I did not understand civilization. Lived by hunting animals in the forest. Your writing about science is very beautiful. Good luck to you.