Explanation of the Big Bang Theory
Name: J Miller
Can anyone help me understand what caused the big bang?
Nobody knows. There is one theory, called "inflation" that suggests it was
caused by a quantum mechanical "fluctuation" in an older background universe
that raised the energy of a very tiny portion in such a way that portion
just grew and grew and grew in size (inflationary expansion). There are
other theories that are associated with black-hole formation in pre-existing
universes. And of course there is the anthropic principle: if we were not
here, then in all probability the universe would look very different.
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Update: June 2012