Dino extinction - confirmation?

its not about disbelieving the story, but i was surprised to hear that this theory is finally confirmed by the scientific society. however, i remain skeptical, because i beleive scintists have been looking for any trails of this great impact and lost the trails of te other theories unil recently they have collected the pieces and got one story which is the great impact. in the end, i still beleive the door is opened to many theories and in my point view its not the end of the mass extinction's great mystrey.