Brian Cox explains the interconnectedness of the universe, explodes…

The Pauli exclusion principle is the quantum mechanical concept that no two identical particles in all the Universe may occupy the same quantum state simultaneously. What does that mean, exactly? Well, for starters, it means that the butterfly effect has nothing on the consequences of the Pauli exclusion principle. » 2/21/12 8:50am 2/21/12 8:50am

Brian Cox and Simon Pegg explain why atoms have so much empty space

If you're a fan of lucid explanations of tricky scientific concepts, it's hard to go wrong with theoretical physicist Brian Cox. But when you mix in physicist Jim Al-Khalili and Simon Pegg, you've got yourself a recipe for pedagogic gold. Also: thinly veiled sex jokes. » 12/28/11 10:30am 12/28/11 10:30am