Subject: Expansion of space, total energy source.

A few questions...


1.  An immense amount of energy would be needed to create 
an "explosion" such as the big bang.  My question is, where did 
this energy come from?  I find it hard to visualize something 
when time, matter, and space didn't exist.  

2.  If nothing (time, matter) existed prior to the 
theoretical 'Big Bang' and all energy existed in a single point, 
then wouldn't that mean that 'empty space' as we know it today 
has been expanding since that point in time?  If true, wouldn't 
that mean that it is not infinite and will become larger and 
larger forever?  And a side question:  Can(will) time end?  

Re: Expansion of space, total energy source.