China builds huge underground transparent sphere to trap 'ghost particles'

A staff member inspects the acrylic sphere inside the central detector of the Jiangmen Underground Neutrino Observatory (JUNO) in Jiangmen, south China's Guangdong Province, Oct. 9, 2024. China has constructed the world's largest transparent spherical detector 700 meters underground to capture elusive neutrinos, often dubbed "ghost particles," to unravel the secrets of the infinitesimally small and the infinitely vast in the universe. (Xinhua/Jin Liwang)