Brian Cox

It fully makes sense that you can't occupy the same space, if only cause that one makes sense in our real world. My cat wants to sleep on my bed - I move for her. But i'm not sure why that means they all must have slightly different energy levels. energy is space?

Also, i *think* either one of the BBC horizin shows, or even BC himself on his talk tried to explain the one electron thing. those are moments when I just shake my head, and wonder how insane physicists are.

Well, bosons can occupy the same quantum state. That's how lasers can build up their intensity. And also how deuterium behaves very differently to hydrogen (protium) - as do the main isotopes of helium, where only one exhibits superfluidity.

That's not really the same as "same space", though. Different atomic orbitals overlap significantly in space, but won't necessarily have the same state or energy.