/technologies/test-and-measurement/b/blog/posts/the-decay-of-xenon-124-is-the-rarest-event-ever-recordedScientists are on the verge of discovering dark matter by using a very powerful detector filled with liquid xenon located a mile beneath Italy's Gran Sasso mountains. While searching for the dark matter particle, they were able to examine a rare ...en-USTelligent Community 12