CHINA TIES Excavations at Vietnam’s Man Bac site, including this work in 2007, uncovered skeletons of farmers from around 4,000 years ago. DNA from these skeletons supports an idea that ancient migrants from southern China spread farming and languages throughout much of Southeast Asia.
BAD BLOOD A strain of E. coli (computer-generated image above) that causes severe diarrhea can latch onto intestinal cells more easily in people with type A blood, a discovery that hints at a potential vaccine.
Alissa Eckert and Jennifer Oosthuizen/CDC
BLEEDS GREEN The few lizards with green blood, such as this green skink from Papua New Guinea, may have acquired the coloring via a spotty pattern of evolutionary history. Their muscles, bones, tongues and gums also look greenish.