Dr. Hsun-Ming Hu, a postdoctoral researcher of the Department of Geosciences, National Taiwan University (NTU), along with an international team led by NTU’s Distinguished Professor Shen Chuan-Chou, has made a significant advancement in geochronology by redefining the half-life of uranium-234 with remarkable accuracy. This new measurement extends the range of uranium-thorium dating from 600 to 800 thousand years (ka), greatly enhancing the precision in understanding Earth's climate history and human evolution. This paper was published on October 1, 2025, in the journal Science Advances (1). The uranium-thorium dating method determines…