High-resolution confocal images show the effects of light-activated molecular drills on cells inside a worm. Before activation, at left, the injected drills remain dark. At right, after 15 minutes of exposure to light, fluorescent signals show widespread damage in the transparent nematodes. The drills developed at Rice University are intended to target drug-resistant bacteria, cancer and other disease-causing cells and destroy them without damaging adjacent healthy cells. (Credit: Thushara Galbadage/Biola University)

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