Following the posting of Schrodinger's Cat... I have now become quite possessed with teaching myself Quantum Mechanics. Thank the heavens for Wikipedia.
A ) You have to love experiments that only exist in theory or in thought... like Heisenberg's Microscope .
B ) Forms of space ( or non-space ) that exist only to define the mathematics of Quantum Theory, like Hilbert Space
Oy... my head's going to hurt something awful. But if I don't think about it, it won't exist.
