How can there be no time before the Big Bang?
Astrophysicists are still debating over the time before the Big Bang, so there is a possibility there was no time before Big Bang and the Big Bang actually created time.
If the Big Bang really created time and astrophysicists can prove it, that means that time DID exist before the Big Bang and it would lead to the Multiverse Theory being correct as some universes would be older than ours and some younger. It would prove that time has always existed and always will. If however, astrophysicists prove that time could not exist before the Big Bang it means that the days of time are actually numbered! Everything that has a beginning would have an end as well.