It took ten years to build the Maverick, a dorm-fridge-sized box that takes in a cartridge with a little bit of blood—more than a drop but, you know, not a pint, either—and spits out new knowledge. On the cartridge is a silicon chip carved with antibody-lined channels; if any of a range of molecules that signal things like celiac disease are floating around, they stick to the antibodies, changing the way the channel reflects infrared light. The machine goes ping. (Not literally.

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