This article came out last week in phys.org. https://phys.org/news/2023-08-neutrinos-cern-large-hadron-collider.html Neutrinos are difficult to detect because they have only a very small mass and no charge. How do you build a detector to find that type of particle? CERN manged to do it via their SND and the details are in the link. Note the quote in the article. "....every time neutrinos have been discovered from a new source, whether it is a nuclear reactor, the sun, the Earth, or supernovae, we have learned something extremely important about the universe."