Science has come a long way and we now have the ability to understand the deeper meaning of things, predict the future activities and also dig in to the history. But what we still are to explore and understand is all about the Universe. With NASA, ISRO and other scape research organizations spending years on studying the nature of the universe, some questions and many mysteries still stand unanswered. Here is the list of 5 of such mysteries about the universe that might force you to think all night long.