FLAGGED A certain pattern of chemical tags on DNA shows up more often in gay men than in straight men, a controversial study in twins suggests.
HOME SWEET GENOME A 4,500-year-old man’s skeleton found in Ethiopia’s Mota Cave has yielded the first ancient human genome from Africa. Rocks placed over the man’s burial were cleared away before excavating the skeleton.
Both: Kathryn and John Arthur
MOLECULAR EDITORS Tomas Lindahl (left), Aziz Sancar (center) and Paul Modrich (right) shared the 2015 Nobel Prize in chemistry for working out how cells fix damaged DNA.
From left: Francis Crick Institute; Max Englund/UNC-Chapel Hill School of Medicine; Courtesy of Duke University