[Kate Davis]

Kate Davis  asked the Naked Scientists:
   
Hi Chris,

I have been thinking this weekend after watching a programme on The Discovery Channel this weekend, "What on earth is the matter with Gravity?" 

If we do not know how gravity works in small forms like protons and neutrons and small particles and we do not know what happens to matter after it has been pulled into a black hole, is it possible that all the matter in our known universe was pulled into a black hole from another universe and then exploded as it came out the other side and caused the "Big Bang"?

Kate Davis

What do you think?

[yor_on]

heh, a white hole I think they call that one. And yes, there are some thinking in those terms, but it's all hypothetical.

[MikeS]

As yor-on said its called a white hole and its hypothetical. 
In a little more detail a white hole is a time reversed black hole.  The jury is still out on that one. 
Imagine the universe to be cyclic and at the end of the last cycle there were one or more black holes. 
If a white hole is a time reversed black hole then an antimatter black hole could expel matter particles (a white hole). 
If a white hole (quasar maybe) expels mass at relativistic velocity along the lines of its poles this could conceivably be the start of a spiral galaxy.  It is believed that galaxies started as spirals.
Conceivably this could have been the start of our universe. 
This is obviously not a mainstream view but is in keeping with your question.