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Surgeons performed more than 21,000 kidney transplants and 8,000 liver transplants in 2018, according the United Network for Organ Sharing. shapecharge/shapecharge/Getty Images hide caption

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A Surgeon Reflects On Death, Life And The 'Incredible Gift' Of Organ Transplant

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Shutdown Puts Work On Hold For Researchers Collaborating With Government Scientists

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People were more likely to try mealworms — such as these mealworm chocolate truffles sprinkled with coconut — when the ad focused on taste and experience, a study showed. Oliver Brachat/for NPR hide caption

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Oliver Brachat/for NPR

Government Shutdown Causes Slowdown In Scientific Research

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A bit of lapis lazuli — a rich blue pigment — is trapped within a central tooth's dental tartar on this lower jaw of a European woman who died sometime between A.D. 997 and 1162. Christina Warinner/Science Advances hide caption

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Christina Warinner/Science Advances

A Blue Clue In Medieval Teeth May Bespeak A Woman's Artistry Circa A.D. 1000

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Prime Minister Narendra Modi (center) attends the opening of the 106th Indian Science Congress at Lovely Professional University on last week in Jalandhar, India. Pardeep Pandit/Hindustan Times via Getty Images hide caption

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Pardeep Pandit/Hindustan Times via Getty Images

As the economy boomed, emissions rose sharply in 2018. Shipping was one source of the increase. Mario Tama/Getty Images hide caption

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Mario Tama/Getty Images

U.S. Carbon Dioxide Emissions Are Once Again On The Rise

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A bag to collect forensic evidence is seen as the New York City Office of Chief Medical Examiner hosts a demonstration of technology that allows them to test degraded DNA samples. Angela Weiss/AFP/Getty Images hide caption

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Angela Weiss/AFP/Getty Images

Using Genetic Genealogy To Identify Unknown Crime Victims, Sometimes Decades Later

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This granary weevil has set up shop inside a kernel. Even without wings, these stealthy stowaways — with the help of humans — have managed to infest grains all over the world for thousands of years. Biophoto Associates/Getty Images/Science Source hide caption

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Biophoto Associates/Getty Images/Science Source