Take the tour ×  Big bang cosmology, as far as I understand it,
says that the universe was super hot and super dense and super
small. It looks like that all the current matter, seen and
unseen, were compressed to infinitesimal distance, which means
it was a black hole.  1- Is the big bang, and our universe
expansion in this case, hence is nothing but a black evaporation
via Hawking radiation?  2- Are we living inside that primordial
black hole explosion?  share|improve this question add comment
1 Answer  up vote 10 down vote accepted  Here is a copy of an
answer I wrote some time ago for the Physics FAQ http://math.ucr
.edu/home/baez/physics/Relativity/BlackHoles/universe.html  Is
the Big Bang a black hole?  This question can be made into
several more specific questions with different answers.  Why did
the universe not collapse and form a black hole at the
beginning?  Sometimes people find it hard to understand why the
Big Bang is not a black hole. After all, the density of matter
in the first fraction of a s