Einstein wrote to Max Born about issues in quantum mechanics in 1947 and used a phrase translated as "spooky action at a distance". The phrase has been picked up and used as a description for the cause of small non-classical correlations between physically separated measurement of entangled quantum states. The correlations are predicted by quantum mechanics and verified by experiments. Rather than a postulate like Newton's gravitational force, this use of "action-at-a-distance" concerns observed correlations which are not easy to explain within simple interpretations of quantum mechanics.