In Science this week, researchers at the New York University School of Medicine and their colleagues compare the genome sequences of the ants Camponotus floridanus and Harpegnathos saltator. Both species' genomes, the authors write, "contained high amounts of CpG, despite the presence of DNA methylation." In their gene expression comparisons, Roberto Bonasio et al. found an "up-regulation of telomerase and sirtuin deacetylases in longer-lived H.