The recent discovery of a "universal" criterion for plastic yielding in metallic glasses was reported in a symposium on Bulk Metallic Glasses held at the recent spring meeting of the American Physical Society in Los Angeles by authors W. L. Johnson and K. Samwer.  Professor Samwer (University of Göttingen, Germany) spent a six-month sabbatical at Caltech, beginning in September 2004.  As part of CSEM IRG 2, he collaborated with Profs. Goddard and Johnson in the development of a "Cooperative Shear" theory of bulk metallic glasses base on MD simulations and experimental work.  The discovery and explanation of the universal yield criteria for metallic glasses was a product of this collaboration.  The figure below illustrates the shear elastic limit of a large number of BMGs vs. T/Tg.  A model has been developed which gives universal strain limit gC = t/G (t = shear stress, G = shear modulus) at T = 0 K for all metallic glasses together with a universal temperature dependence obeying a "T2/3-Law.  The work will be reported in an upcoming publication (Phys. Rev. Lett., in press).