Listening for the Universe's Faintest Whispers, a Billion Supernovae at Once

Scientists at the Super-Kamiokande observatory in Japan are analyzing data to detect the 'Diffuse Supernova Neutrino Background,' a faint signal from historical supernovae. This research aims to better understand the history of star formation and death across the universe.
How do you listen for something quieter than almost anything else in nature, a signal built from ghostly particles that pass straight through solid rock without so much as slowing down? A thousand metres beneath Gifu Prefecture in Japan, an international team working at the Super-Kamiokande observatory believes they may have caught the very first hint of exactly that.
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