"We started from a very simple question: how did this photon survive a journey that, according to known physics, should have destroyed it?"

"We started from a very simple question: how did this photon survive a journey that, according to known physics, should have destroyed it?"

An extremely energetic photon from GRB 221009A has puzzled physicists. This photon traveled over two billion light-years to reach Earth detectors. Standard physics predicts such…