A Brief History of Time: From Big Bang to Black Holes’ poses some interesting and unanswered questions, like if there had been any beginning of time or if time can run backwards or if there is any boundary to the universe itself. Stephen Hawking, the great scientist and theoretical physicist, tries to answer it all by drawing theories of the entire cosmos from Albert Einstein to Newton. In doing so, he also sheds considerable light on the dark secrets that still reside at the heart of time and space.