^Oh, I wish I could take Lawrence Krauss and put him in my
   pocket - his sense of humor, humility, all shines through the
   whole talk. If you want to know the scientific basis behind
   everything, some of the troubles faced by current physics, or
   fill in the gaps in your knowledge of things, he's your man and
   this is the talk. It's an hour of your life but you won't regret
   it if you have even the slightest interest in such things.
   ^