Swiss Scientists Perform Massive Test of 80-Year-Old, 'Spooky' Quantum Paradox
"The story begins more than 80 years ago. Way back in 1935, Einstein and physicists Boris Podolsky and Nathan Rosen found something strange. They entangled two particles — let's call them Alice and Bob — so that their physical properties were linked even across wide distances, and anything you did to one particle would impact the other."
There is a good description of this and as much of an explanation as can be done in John Gribben's book, In Search Of Shrodinger's Kittens. I think all of his books are great reads because he writes about things in full but in plain language whenever possible.