COLLOQUIUM Speaker: S:BORGANI Title: Tracing the Dark Content of the Universe: The Role of Galaxy Clusters. Time and Place: Thursday 12th January , 4 PM.Physics Dept. Univ. of Trieste, Via Valerio 2, Room A, -- http://www-dft.ts.infn.it/~gozzi/ "Physicus, id est speculator venatorque naturae" Cicero (de Nat. Deor. 1, 82)