Connecticut, Middlebury and Williams Colleges on Friday announced a new effort to diversify the faculties of liberal arts colleges. The Andrew W. Mellon Foundation is providing funds for the colleges to work with Columbia University and the University of California at Berkeley to organize an annual event where students at 23 liberal arts colleges will learn about graduate school opportunities at research universities and careers for those who earn doctorates, create research internships at the two universities for under-represented students at the colleges, and create postdoctoral fellowships for new Ph.D.s at the universities to experience life at liberal arts colleges.