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Jeff Mitton, professor and chair of CU-Boulder's ecology and evolutionary biology department, is available to talk about the repercussions of oil spills. Mitton was on sabbatical in 1979-1980 at the Marine Biological Laboratory in Woods Hole, Mass., where he studied a 1969 oil spill that seeped into the Sippewissett Marsh.

Colorado Gov. Bill Ritter will deliver the keynote commencement address for the University of Colorado Law School on Friday, May 11, at_11:30 a.m. to 165 law school graduates. The class of 2007 is the first to graduate since the opening of the new Wolf Law Building. Commencement ceremonies will be held in Macky Auditorium on the CU-Boulder campus. Doors to Macky will open at 10:45 a.m. for family and friends. Gov. Ritter is a 1981 graduate of the law school. This is the governor's first commencement address since taking office in January.