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The heaviest known Fermion particle -- the top quark -- was discovered atFermilab in the first run of the Tevatron in 1995. However, besides its mereexistence one needs to study its properties precisely in order to verify orfalsify the predictions of the Standard Model. With the top quark's extremelyhigh mass and short lifetime such measurements probe yet unexplored regions ofthe theory and bring us closer to solving the open fundamental questions of ouruniverse of elementary particles such as why three families of quarks andleptons exist and why their masses differ so dramatically.  To perform these measurements hundreds of millions of recordedproton-antiproton collisions must be reconstructed and filtered to extract thefew top quarks produced. Simulated background and signal events with fulldetector response need to be generated and reconstructed to validate andunderstand the results. Since the start of the second run of the Tevatron theD0 collaboration has brought Grid computing to its aid for the production ofsimulated events. Data processing on the Grid has recently been added andthereby enabled us to effectively triple the amount of data available with thehighest quality reconstruction methods.  We will present recent top quark results D0 obtained from these improved dataand explain how they benefited from the availability of computing resources onthe Grid.Comment: 10 pages, 8 figures, Invited talk at SciDAC2005, San Francisco, CA,  26-30 June 200

DØ top quark results and their dependence on successful Grid computing