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Google's mini radar can identify virtually any object
Google's Project Soli radar technology is useful for much more than controlling your smartwatch with gestures. University of St. Andrews scientists have used the Soli developer kit to create RadarCat, a device that identifies many kinds of objects just by getting close enough. Thanks to machine learning, it can not only identify different materials, such as air or steel, but specific items. It'll know if it's touching an apple or an orange, an empty glass versus one full of water, or individual body parts.
