A discovery : the violation of parity
These photos shows the actors of the discovery of parity violation in weak interactions in 1956. This was first predicted by two young Chinese theorists, TD Lee and CN Yang. They introduce the idea that weak interaction might not verify one of the fundamental symmetries of physics. This prediction was verified a few months later in an experiment on beta decay of cobalt-60, by Madame Wu. Everything was as if a core of Cobalt and its mirror image disintegrated differently. This did tell Wolfgang Pauli, neutrinos father, who can be seen with the young experimenter, that "God was a little left-handed." Lee and Yang were awarded with the Nobel Prize in Physics barely a year later, in 1957.
DR