Number 8 (Story #2), November 12, 1990 by Phillip F. Schewe and Ben Stein SPIN EFFECTS IN PROTON-PROTON SCATTERING cannot be explained by quantum chromodynamics (QCD), the prevailing theory of the strong nuclear force, asserts Alan Krisch of the University of Michigan. Krisch is the leader of a team of scientists at Brookhaven National Lab where a beam of 24-GeV protons is smashed into a target in which 96% of all protons are oriented in a single direction. The observed left-right asymmetry in the way beam protons scatter form the polarized target protons (confirming previous experiments at Brookhaven, but now with greater precision) is at odds with QCD, Krisch believes. Other scientists feel that the QCD could yet account for the apparent spin effects. (Science News, November 3. Contact: Alan Krisch, University of Michigan, 313-936-1027.)