Quantum Entanglement Concept Effects travel at thousands of times the speed of light The reason I removed the statement about effects travelling at the speed of light was mentioned in the talk page for the article More generally QM theory does not support the notion that there is an effect that travels from the first measurement event to the second Indeed the point about the lack of order in space like separated measurement events means that one can not in all cases determine which is the first measurement from which the effect would have to travel The second reference cited work which dealt with a hypothetical preferred frame but there is as yet no evidence that such a frame exists