Google aims for bloodborne search engine

Google is working on a cancer-detecting pill in its latest effort to push the boundaries of technology.

Still in the experimental stage, the pill is packed with tiny magnetic particles, which can travel through a patient's bloodstream, search for malignant cells and report their findings to a sensor on a wearable device.

As many as 2,000 of these microscopic "nanoparticles" could fit inside a single red blood cell to provide doctors with better insights about what is happening inside their patients.

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