Quantum chicken-or-egg experiment blurs the distinction between before and after

In the everyday world, events occur in a definite order—your alarm clock rings before you wake up, or vice versa. However, a new experiment shows that when fiddling with a photon, it can be impossible to say in which order two events occur, obliterating our common sense notion of before and after and, potentially, muddying Read more about Quantum chicken-or-egg experiment blurs the distinction between before and after[…]