sentences:  Gardner follows the thread of several false leads on the road to the solution of the Ozma Problem, in each case presenting an apparent solution which, on closer examination, turns out to be a false one.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.