Bell's Theorem: Another description of Bell's Solution to the EPR Paradoxon.
Bell's Theorem: An overview of Bell's Theorem and its applications in quantum mechanics.
Einstein-Podolsky-Rosen Experiment: A simple overview of the EPR thought experiment which was thought to contradict Heisenberg's uncertainty principle
EPR Paradox: Another site describing the EPR Paradox.
Schroedinger's Cation: Physicists prove that an atom can be in two different places at once.
The EPR Experiment: A somewhat technical review of the EPR paradox and the Aspect experiment which was designed to test it.