There are no Big Bangs but rather a collision or,,,, an expansion after great compression inside a super massive black hole.

in other words

There are 2 possiblilities in my way of thinking in the creation of a universe...

#1 a black hole creating a universe seperate from our own

#2 a COLLISION of 2 universes (the intersection of 2 branes of existence) that have enough in common somehow to allow an interaction.

or for kids under 4 years of age....
#3 god did it 6000 years ago.