Quantum entanglement used to measure rotation of the earth

 A new technique has been devised that allows physicists to use quantum entanglement to measure the rotational rate of the earth. This is yet another example of the expanding set of experiments that are using quantum mechanical phenomena to measure all sorts of other phenomena, in addition to new quantum mechanical properties. There is a hope that experiments like this will lead to new insights of how quantum mechanics and gravity are related - the Holy Grail of physics is to construct a theory encompassing general relativity (gravity) with quantum mechanics and the Standard Model.