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3-D printed doll's face

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.

ocean water samples

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.

bowl of cookie batter

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. 

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