https://host.madison.com/news/local/education/university/uw-madison-led-team-and-antarctic-observation-led-to-discovery/article_866eef4d-fcf0-5b81-9e22-0f5ebbf86bf2.html

The scientific question eluded researchers around the world for more than a century.

But one day last fall, a mile below sheets of ice at the Amundsen–Scott South Pole Station in Antarctica, a detector pinged.