Super-Kamiokande Finds First Evidence of the Diffuse Supernova Neutrino Background: The Faint Whisper of Every Dead Star
The Super-Kamiokande collaboration has caught the first-ever evidence of the diffuse supernova neutrino background, the combined glow of every massive star that has died since the universe began. Here is what it could reveal, and the spoonful of gadolinium that made it possible.