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Science News May 26, 2007 Julie J. Rehmeyer	Covering New Ground with Polygons Mathematicians can cover larger areas than they'd realized using polygons with fixed diameters.
Science News June 12, 2004 Ivars Peterson	Groups, Graphs, and Erdos Numbers Perhaps more than any other mathematician in modern times, Paul Erdos (1913-1996) epitomized the strength and breadth of mathematical collaboration.
Science News July 14, 2001 Ivars Peterson	Pursuing Pursuit Curves A pursuit curve is the path an object takes when chasing another object. Such a path might result from a fox pursuing a rabbit or a missile seeking a moving target. Plotting pursuit curves can produce fascinating patterns...
Science News August 6, 2005 Ivars Peterson	Playing with Ruth-Aaron Pairs Mathematicians have taken the home run records of Hank Aaron and Babe Ruth and made the fascinating discovery that the numbers have more in common than just baseball.