Daphnia, a species of plankton, were exposed to molecular machines developed at Rice University in lab experiments to determine the effects of the microscopic drills on tissue. At left is a healthy plankton with all of its appendages. At right, the daphnia has only two of its appendages after 10 minutes of exposure to light-activated nanomachines. The drills are intended to target drug-resistant bacteria, cancer and other disease-causing cells and destroy them without damaging adjacent healthy cells. (Credit: Alison Buck/Biola University)

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