Exploding stars may have caused mass extinction on Earth, study shows - Phys.org

Imagine reading by the light of an exploded star, brighter than a full moon—it might be fun to think about, but this scene is the prelude to a disaster when the radiation devastates life as we know it. Killer cosmic rays from nearby supernovae could be the cu… https://phys.org/news/2020-08-stars-mass-extinction-earth.html