flexible recent paperback paperback (2008) devoted to reflections on different scientific problem of the origin of the universe; Does the universe has existed from eternity ?; So what was this energy that gave birth to the Big Bang and thus to our whole universe ?; six visions each with its angle of attack, all informed by the latest findings of basic sciences; this little book short and easy to read, captivate all those who ask these questions but of course can not replace the more specialized and complex structures. Anyway do not look for clear and indisputable answer: it does not exist!