The Universe Is Not Locally Real, and the Physics Nobel Prize Winners Proved It
scientificamerican.com
scientificamerican.com
1960: Bell finds a set of equations (Bell’s inequalities), they are a set of measures of correlations of a quantum system that separates cases: if the correlation is under a certain limit then QM has hidden variables, if it’s over then there are no hidden variables: QM must be a non-local theory.
After this, experimental physicit have implemented this experiment with more and more precision. All the experiments point towards non-local reality.