Bell's Theorem - An overview of Bell's Theorem and its applications in quantum mechanics.

Bell's Theorem - Another description of Bell's Solution to the EPR Paradoxon.

Bell's Theorem - A description of Bell's Theorem for laymen in the form of a game.

Einstein-Podolsky-Rosen Experiment - A simple overview of the EPR thought experiment which was thought to contradict Heisenberg's uncertainty principle

The EPR Experiment - A somewhat technical review of the EPR paradox and the Aspect experiment which was designed to test it.

EPR Paradox - Another site describing the EPR Paradox.

Schroedinger's Cation - An old Scientific American article including an outline of the infamous Schroedinger's Cat experiment.