ERIK VIKTOR / SCIENCE PHOTO LIBRARY ERIK VIKTOR / SCIENCE PHOTO LIBRARY
Medical nanorobots. Computer illustration of nanorobots at work in a human blood vessel. The vessel contains red blood cells (red discs) and two types of white blood cell (transparent spheres and yellow objects). The tiny robots at upper right are using their drills to break up an abnormal blood clot that is restricting blood flow. A camera carried by the robot in the foreground may be transmitting wide-angle images to a surgeon. Another robot is injecting chemotherapy (anti-cancer) drugs into the cancerous cell at upper left. Each nanorobot is powered by two small propellers.
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