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Animal testing is taken to a new level as French scientists work to refine a rat blood fuel cell that's the first ever to function inside a living body. Glucose-powered batteries have been developed before, but this rodent literally embodies a revolutionary technology that will change the future of pacemakers and insulin-injectors for those in need.

Having been accepted by the rodent's body, the rat blood fuel cell opens doors to implantable devices for humans that can monitor glucose and oxygen and help sufferers of diabetes. Evidence shows even brain chemicals may be moderated for Alzheimer's and Parkinson's patients.