Astronomers studying stars and black holes have made a discovery that could lead to safer, more effective cancer treatments down the road. A new kind of radiation therapy? The researchers' computer simulations suggest that hitting a single gold or platinum atom with a small dose of X-rays at a narrow range of frequencies produces a flood of more than 20 low-energy electrons. These ejected electrons can kill cancer kills, shredding their DNA, researchers said. So doctors could embed many heavy-metal nanoparticles inside and around tumors, then hit them with a tailored shot of radiation. The resulting electron shower could obliterate a tumor. And the process would greatly reduce a patient's radiation exposure compared to most current radiation treatment methods, researchers said. Could Black Holes Help Treat Cancer Patients?