In the Dec. 9 SN: Lessons from the Pliocene, searching for new ways to fight MS, a supernova on repeat, the great gene drive debate, spider sleep secrets, an ailing boy gets new skin, kleptopredation and more.
IT’S ALIVE Living bacteria can give 3-D printed materials special powers, such as producing form-fitting wound dressings. Here, such a material is printed on a doll’s face and stained to fluoresce blue.
Manuel Schaffner and Patrick A. Rühs
DEEP FIXERS Scientists collected ocean water at different depths using this rosette (center), revealing that an abundant group of nitrite-oxidizing bacteria called Nitrospinae dominate carbon “fixation” in the deep ocean.
DOUGH DEBACLE In 2015 and 2016, E. coli-tainted flour sickened dozens of people in the United States, most of whom had eaten raw dough or batter while baking.