11ac1064_ions___Astronomy___Black_Holes__Question
[Date Answered] April 30, 1998 [Questioner (age, location)] Rahul (New Jersey, U.S.A.) [Answer] This question is a very difficult one... the answer is that no one knows the answer. For a (complicated) discussion on this topic, you might try this page. The thing about white holes is that based on our current knowledge of the universe, they are not possible. (They violate the second law of thermodynamics.) However, as the article says, there is no guarantee that the rest of the universe is like what we know now. Thus, we can't totally rule out the possibility of the universe having come from a white hole. [Question] 
Could the universe have formed by a white Hole? Suppose another physical universe such as our own underwent a big crunch. Could not have all the matter in the big crunch create a black hole powerful enough to entirely devour all the matter in that uni verse and eject it into a new universe in the form of a white hole. Thus this theory partly accepts the big bang theory, that states that the universe started from a single point from which space and time started, except this big bang was created by an enormous and powerful black hole. Can this be possible?
Quickie Questions - Astronomy - Black Holes