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A $10 chip could bring lab-grade health tracking to your wrist

I love this idea: Cambridge researchers have developed a tiny, low-cost optical spectrometer that could bring lab-level precision to wearable health monitors. The roughly $10 device analyzes light quickly and accurately, and could one day help people track blood glucose without needles. Tests also showed promise for identifying materials including plastics, medicines, coffee, flour, and tea. And here's the thing - the same compact technology could improve food testing, industrial quality control, and environmental monitoring.
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