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Their research is still in early stages, but Kristin Myers (left), a mechanical engineer, and Dr. Joy Vink, an OB-GYN, both at Columbia University, have already learned that cervical tissue is a more complicated mix of material than doctors ever realized. Adrienne Grunwald for NPR hide caption

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Adrienne Grunwald for NPR

Scientific Duo Gets Back To Basics To Make Childbirth Safer

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Dramatic decreases in deaths from lung cancer among African-Americans were particularly notable, according to the American Cancer Society. Siri Stafford/Getty Images hide caption

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Siri Stafford/Getty Images

Scientists around the world criticized Chinese researcher He Jiankui's experimental editing of DNA in embryos that became twin girls. Anthony Wallace/AFP/Getty Images hide caption

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Anthony Wallace/AFP/Getty Images

In 2011, a 17-year-old named Mishka told readers of his Facebook post that his Salem, Ore., high school was "asking for a f***ing shooting." That post and other furious outbursts triggered a quick, but deep evaluation by the school district's threat assessment unit. Beth Nakamura for NPR hide caption

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Beth Nakamura for NPR

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A white-tailed deer keeps its ears open while grazing in South Hero, Vt. Rob Swanson/AP hide caption

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Rob Swanson/AP

Hungry Deer May Be Changing How Things Sound In The Forest

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Scientists have isolated a molecule with disease-fighting potential in a microbe living on a type of fungus-farming ant (genus Cyphomyrmex). The microbe kills off other hostile microbes attacking the ants' fungus, a food source. Courtesy of Alexander Wild/University of Wisconsin hide caption

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Courtesy of Alexander Wild/University of Wisconsin

Images of the object nicknamed Ultima Thule photographed from the New Horizons spacecraft on Jan. 1. NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute/Getty Images hide caption

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NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute/Getty Images

A researcher examines the underwater hull of the USS Hornet CV-8, which played a role in several key events of World War II. Photo courtesy of Paul G. Allen's Vulcan Inc hide caption

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Photo courtesy of Paul G. Allen's Vulcan Inc
Angela Hsieh/NPR

Person undergoing a CAT scan in hospital with PET scan equipment. Emerging studies report findings of brain deterioration in females to be slower than that of males'. Johnny Greig/Getty Images hide caption

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Johnny Greig/Getty Images

Scans Show Female Brains Remain Youthful As Male Brains Wind Down

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Ariel Davis for NPR

If You're Often Angry Or Irritable, You May Be Depressed

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Dieter Egli, a developmental biologist at Columbia University, and Katherine Palmerola examine a newly fertilized egg injected with a CRISPR editing tool. Rob Stein/NPR hide caption

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Rob Stein/NPR

New U.S. Experiments Aim To Create Gene-Edited Human Embryos

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NASA's rover Curiosity crawls up the side of Vera Rubin Ridge on Mars' surface in January 2018. Mount Sharp — a 3-mile-high mountain — can be seen in the distance. MSSS/ NASA/JPL-Caltech hide caption

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MSSS/ NASA/JPL-Caltech

Exploring The Mysterious Origins Of Mars' 3-Mile-High Sand Pile

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After scientists screened over 8,000 genes in fruit flies, only one, which hadn't been described before, triggered sleepiness. Andrew Syred/Science Source hide caption

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Andrew Syred/Science Source

The drugs clonazepam and diazepam are both benzodiazepines; they're better known by the brand names Klonopin and Valium. The drug class also includes Ativan, Librium and Halcion. Bloomberg/Getty Images hide caption

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Bloomberg/Getty Images

As a child on a New York farm, Eben Bayer helped his dad shovel wood chips in the barn. That's where he noticed a stretchy web of fungus that became the basis of his biodegradable packing material. NPR hide caption

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NPR

A scanning electron micrograph shows microglial cells (yellow) ingesting branched oligodendrocyte cells (purple), a process thought to occur in multiple sclerosis. Oligodendrocytes form insulating myelin sheaths around nerve axons in the central nervous system. Dr. John Zajicek/Science Source hide caption

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Dr. John Zajicek/Science Source

Even something as simple as chopping up food on a regular basis can be enough exercise to help protect older people from showing signs of dementia, a new study suggests. BSIP/UIG/Getty Images hide caption

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BSIP/UIG/Getty Images

Daily Movement — Even Household Chores — May Boost Brain Health In Elderly

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