I consider Extended Wigners Friend Problem Experiment to be quite fascinating. This experiment has already been performed, but I expect its results to be fully understood by the masses. And I am not proffesional physicist and want to understand it better too by myself. a-quantum-experiment-suggests-theres-no-such-thing-as-objective-reality The results of this experiment call into question one or more assumptions about the existence of objective reality, freedom of choice, or locality. All three cannot exist together. But personally, I think that the second and third points have been checked a lot of times, so no matter how improbable it may seem, the first point is the most likely.