LIFE SAVERS? New gene-editing methods may make pig organs safe for human transplant.
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.