Where Did the Universe's Antimatter Go? Scientists Inch Closer to Solving the Mystery

The K in T2K refers to Kamioka, Japan, where the Super-Kamiokande Detector resides deep underground. The detector uses this giant, water-filled cylinder to detect neutrinos shot from 180 miles away in Tokai — the T in the project’s name. Recent data show how neutrinos and antineutrinos change from one type to another — at different rates — as they travel. (Credit: Kamioka Observatory/CIR )