Adding to all those other "You know your science has hit the mainstream when..." signs, the Economist has an article on epigenomics. The story reports on the epigenomics program that's part of the NIH Roadmap, and in particular work from Ryan Lister and Mattia Pelizzola at the Salk Institute who studied epigenomics in embryonic stem cells. "The presumption is that the pattern of methylation, by controlling which proteins are manufactured, helps determine what type of cell is produced," the story says.