  Quantum nonlocality would naturally fit into a version of relativity with a
preferred reference system. However, acceptance of this idea has traditionally
required experimental evidence. Namely, detecting in laboratory a small angular
dependence of the velocity of light correlated to the cosmic motion of the
Earth. Here, we summarize a new theoretical framework where the tiny, irregular
residuals observed so far, from Michelson-Morley to current experiments of
laser interferometry, can indeed be understood in terms of the Earth motion in
the Cosmic Microwave Background observed directly with satellites in space. Our
results, challenging the usual null interpretation, emphasize the central role
of 'ether-drift' experiments for Relativity, Cosmology and Quantum Physics.
