Chien-Shiung Wu
The solution to the Ozma Problem was finally embodied in the famous "Wu experiment", conducted in 1956 by Chinese-American physicist Chien-Shiung Wu (1912–1997), involving the beta decay of cobalt-60. This experiment was the first to disprove the conservation of parity. At long last, according to Gardner, it is believed that one could carefully describe the Wu experiment to a distant extraterrestrial intelligence and thereby convey the exact meaning of left/right.