I just want to start a discussion on the universe.?

"We just are ignorant of our surroundings" I think this beautiful irony sums up what u said. You are ignorant of other people not being ignorant. "We do not yet know about ANYTHING."- You shoudlnt generalise about other people, some people know plenty. Before you go making outlandish statements like this you should do soem research. Each one of your qalms about unknown galaxys, possible mutiverses and new elements each deserves an answer, but i fear you are to caught up in your thoughts to care.