A growing number of startups and full-fledged companies are looking to bring their smart technology into your mouth. A toothbrush that uses AI to monitor your brushing, dental floss as a subscription service, wearables for teeth—oral hygiene…

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Randeep Hothi was driving north on California's Interstate 880 in April when he spotted a red Tesla Model 3. The sight was unremarkable—in Fremont, where Hothi's parents live and Tesla has its auto plant, the electric sedans are…

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Founder and CEO of Casa dos Ventos Energias Renovaveis SA Araripe had just sold a diesel-burning carmaker to Ford Motor Co. when, in 2007, he decided to invest in the strong winds that blow over Brazil's northeast. Since then his company, Casa…

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For decades, Irba Jana has scraped out a modest living from sugar cane, selling his harvest to mills run by Ethiopia's state-owned sugar monopoly. But lately he's been working as a security guard to supplement his income, as two of the three nearby…

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Amid the tense debate over online political advertising, it may seem strange to worry that Facebook gives campaigns too little control over whom their ads target. Yet that's the implication of a study released this week by a team of researchers at…

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