Scientists have the ability to use DNA from three adults to make one embryo. But should they? A. Dudzinski/Science Source hide caption

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Tim Kilroy runs a business from his home in Arlington, Mass. His insurance company quit covering the long-acting Ritalin that helps him manage his ADHD. Ellen Webber for NPR hide caption

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Nexium is one of several popular medications for heartburn and acid reflux called proton-pump inhibitors. Daniel Acker/Bloomberg via Getty Images hide caption

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Isabel Seliger for NPR

A hearing test you take on your phone provides immediate, private feedback. George Doyle/Ocean/Corbis hide caption

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After years fighting a heroin addiction, Danny Montgomery, 33, is receiving inpatient treatment that is being paid for by Los Angeles County. Anna Gorman/KHN hide caption

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A group at MIT built this tiny package of sensors to collect vital signs as it travels through the digestive system. Albert Swiston/MIT hide caption

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