Bionic engineering may not be fiction afterall ... 

"Implantable antenna designed using silk and gold. Silk: it's stronger than Kevlar, thinner than a human hair, it's biocompatible (it doesn't trigger human immune system response), and it's produced by insects (although some new-fangled metabolically engineered bacteria seem to be up to the task). Researchers at Tufts University have created a silk and gold biosensor that can be implanted in the body to keep tabs on proteins and chemicals. One possible use would be to keep track of diabetic's glucose levels, notifying the patient when things go wonky."

Source: Engadget

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