Spermbots Offer a Promising New Way to Target Cancer

Chemotherapy is brutal. The drugs are delivered in near-toxic doses to penetrate tumor ­tissues, indiscriminately vanquishing the patient’s appetite, hair, and immune system alongside cancer cells. Scientists have tried everything from nanoparticles to homing-beacon bacteria to better target the disease. Now researchers at Germany’s Institute for Integrative Nanosciences are deploying a natural-­born infiltrator: sperm. The …

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