Number 105 (Story #3), December 4, 1992 by Phillip F. Schewe and Ben Stein RUMORS OF TOP-QUARK EVENTS in the data sample of high-energy proton-antiproton collisions accumulated by the CDF (Collider Detector at Fermilab) experiment surfaced again, this time at a divisional (particle physics) meeting of The American Physical Society in Chicago two weeks ago. But the discussion of intriguing hints of the top's existence is not the same thing as an announcement of a discovery, as CDF co-leader Melvin Shochet was quick to point out. (Science, 20 Nov. 1992.) Controversy earlier in the year arose because of an unauthorized analysis and discussion of CDF data. (Science, 24 July 1992.)