Hello everyone, Usually, I think a lot about topics like, what's beyond our observable universe?, or could there be something inside an atom?, I have tried to understand string theory. But, when I told some of my ideas about the universe to my physics lecturer, he asked me to think about something which is more useful and relavent to the world today. That's why I wanted to know, how is thinking about topics like 'what's outside the universe', useful and relavent to the world today? It would be helpful if I get the answer as quickly as possible. Thankyou.