Jiangmen Underground Neutrino Observatory (JUNO) is set to unlock the secrets of nature’s most elusive subatomic particle: the neutrino.
In an enormous cavern, 700m (almost 2,300ft) beneath a wooded hill in southern China, an extraordinary scientific instrument is being built.

The Jiangmen Underground Neutrino Observatory (JUNO), a 20,000-tonne (almost 19,700-ton) sphere of a detector liquid surrounded by 43,000 super-sensitive light detectors, is set to probe the secrets of nature’s most elusive subatomic particle: the neutrino.