Written in the skies: why quantum mechanics might be wrong : Nature News

Written in the skies: why quantum mechanics might be wrong : Nature News: "These premises troubled Albert Einstein. He believed that particles contain extra properties — or 'hidden variables' — that determine their behaviour completely. If only we knew what these hidden variables were, we could predict the fate of particles and the outcome of measurements with certainty. Bohmian mechanics is one of a suite of 'hidden variables' theories — many now discredited — formulated to tackle this problem."