Before The Big Bang

No, not the TV show.  The real Big Bang which started everything.  Or did it?  What happened before the Big Bang?  Does that question even make any sense?  Was there nothing before then?  What does nothing mean?  Was famed cosmologist William Preston on the right track when he hypothesized "nothing from nothing leaves nothing"?  Why am I here?  Spend a few minutes listening to the delightfully named Tim Maudlin, Professor of Philosophy at NYU talk about the competing theories of what happened before anything happened.

Professor Maudlin from The Atlantic