The Emilio Segre Lecture: Quantum Physics and - Superposition, Entanglement, and Raising Schroedinger's Cat.
The Big Questions - Is It Time For All Religions To Accept Evolution: excellent talk!
Why is there something instead of nothing? In other words: Why does the universe exist (and why are we in it)? Philosopher and writer Jim Holt follows this question toward three possible answers. Or four. Or none.