The Wu experiment, conducted by physicist Chien-Shiung Wu in 1956, tested the principle of parity conservation in weak nuclear interactions. It involved observing the behavior of cobalt-60 nuclei as they decayed, specifically focusing on the emitted electrons' direction. The results showed a preference for one direction, contradicting the assumption that physical processes should be symmetrical. This groundbreaking experiment provided evidence that parity is not conserved in weak interactions, leading to significant implications in particle physics. The findings contributed to the development of the Standard Model and earned Tsung-Dao Lee and Chen-Ning Yang the Nobel Prize in Physics, while Wu's contributions were often overlooked.