Let Scooba loose, and it will not only vacuum but also squirt, scrub, squeegee, and suck your floor dry–a first for household robots. By condensing the device's components, iRobot kept the bot to the size of a 3.5-inch-high dinner plate. $400
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Inside NASA's astronaut bootcamp and the grueling new training regimen for deep space. Plus, ten young geniuses shaking up science today, one writer's quest to analyze every man-made chemical in her body and more.
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