Inside a sealed clean room near Toulouse, France, Maurice Sylvestre points out something called SuperCam. Tall, with square-frame glasses, a corduroy jacket and a full head of brown hair, he resembles a mid-1980s version of actor Michael Caine, if Caine were an astrophysicist (and French). But right now it's hard to catch the resemblance: Sylvestre is outfitted in Tyvex and hairnets, necessary to keep out dust, skin particles, and dirt that could mar the super-smooth surface of his device.

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