Led by Catherine Dulac, the Higgins Professor of Molecular and Cellular Biology, a team of researchers has identified more than 40 new “imprinted” genes, in which either the maternal or paternal copy of a gene is expressed while the other is silenced. The findings, described in a recent paper in eLife, reveal how genomic imprinting can dramatically expand biological diversity, and could have important implications for understanding the brain. (The Harvard Gazette, July 29, 2015 article) File photo by Kris Snibbe/Harvard Staff Photographer