Most of the attendees at the Consumer Electronics Show, in January, were on the hunt for self-driving cars and improved smartphone cameras, but I arrived at the Las Vegas expo looking for high-tech innovations in beauty.

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I walked past the AI chemistry teachers and the robot puppy, and headed straight to the at-home lipstick maker and plaque-detecting toothbrush. Over the course of three days, I discovered that our makeup and skin-care routines will be just as high-tech as our living rooms—and change is coming faster than you’d think. The Smart Toothbrush Brushing your teeth is possibly the least sexy part of your daily routine, which is probably why the average person only spends about 45 seconds doing it. (The American Dental Association recommends a full two minutes.) But […]

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