09/01/2026
Could scientists be closing in on one of the universe’s greatest mysteries?
An international collaboration, including Northwestern University physicist Eric Dahl, has found the most compelling hint of elusive dark matter to date.
Nearly a mile underground in South Dakota, the LUX-ZEPLIN experiment recorded a single particle interaction that researchers cannot explain through known sources. After extensive analysis, the team estimates there is just a 0.5% chance that the unusual signal came from an ordinary phenomenon.
The scientists are not claiming a discovery. Not yet. But Dahl, who has searched for dark matter for two decades, calls it “the most interesting single event” he has seen during that time.
Dark matter is invisible, yet it makes up roughly 85% of all matter in the universe. Understanding what it is could transform our knowledge of the cosmos and reveal new physics beyond the Standard Model.
The detector has collected only one-quarter of its planned data, so the search—and the careful work of testing this result—continues.
Learn more about the signal and Northwestern’s role in the international collaboration:
https://news.northwestern.edu/stories/2026/09/dark-matter-detector-picks-up-a-mysterious-signal
Dark matter experiment detected a single particle event that known background sources struggle to explain.