I have already written about Fermi paradox a lot but it’s a puzzle that I’m really interested in solving. And I’m afraid it may be the most important task facing humanity in the foreseeable future. Previously, I felt almost embarrassed and thought I just was characterized by an inherent fear of the unknown.But now I feel more and more that there are major issues in this topic that can not be left unanswered. I do not want mankind to go the same fate as the dinosaurs. It is simply not acceptable. Perhaps the disappearance of the dinosaurs actually a clue as to how to explain the Fermi paradox?