BRAINBOW Scientists have imaged the fruit fly brain in new detail. Colors highlight the paths of nerve cells that have been mapped so far. Cells with bodies close together share the same color, but not necessarily the same function.
Full Adult Fly Tracing Community, Philipp Schlegel/Drosophila Connectomics Group/Univ. of Cambridge
RIGHT ON TARGET A painkiller made with botulinum toxin prevents certain nerve cells (green) from relaying pain information to the brain in mice.
WATER WOES For years, residents in Flint, Mich., have had to rely on bottled water from water pickup sites (one shown) after corroded city pipes sent lead levels in tap water skyrocketing.