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Nearly 30 years after its last documented sighting, a silver-backed chevrotain was spotted by a camera set up in the forest of southern Vietnam. Southern Institute of Ecology/Global Wildlife Conservation/Leibniz Institute for Zoo and Wildlife Research/NCNP hide caption

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Southern Institute of Ecology/Global Wildlife Conservation/Leibniz Institute for Zoo and Wildlife Research/NCNP

To deal with chronic pain, Pamela Bobb's morning routine now includes stretching and meditation at home in Fairfield Glade, Tenn. Bobb says this mind-body awareness intervention has greatly reduced the amount of painkiller she needs. Jessica Tezak for NPR hide caption

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Jessica Tezak for NPR

Meditation Reduced The Opioid Dose She Needs To Ease Chronic Pain By 75%

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Maryland now offers the country's first master's degree in the study of the science and therapeutics of cannabis. Pictured, an employee places a bud into a bottle for a customer at a weed dispensary in Denver, Colo. Bloomberg via Getty Images hide caption

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Bloomberg via Getty Images

You Can Get A Master's In Medical Cannabis In Maryland

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Mourners hold candles as they gather for a vigil at a memorial outside Cielo Vista Walmart in El Paso, Texas, U.S., on Wednesday, Aug. 7, 2019. Luke E. Montavon/Bloomberg/Getty Images hide caption

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Luke E. Montavon/Bloomberg/Getty Images

Two fourth-graders rock side to side while doing math equations at Charles Pinckney Elementary School's "Brain Room" in Charleston, S.C., in 2015. John McDonnell/The Washington Post/Getty Images hide caption

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John McDonnell/The Washington Post/Getty Images

Augustine of Hippo was among those in the Catholic Church who championed its eventual rejection of intrafamily marriages, which researchers say may have paved the way for a breakdown of extended family networks in Western Europe. Fine Art Images/Heritage Images/Getty Images hide caption

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Fine Art Images/Heritage Images/Getty Images

Indonesians independently carry out fumigation in their neighborhood to eradicate the larvae of mosquitoes that cause dengue fever. A new vaccine to prevent dengue may be on the horizon. Aditya Irawan/NurPhoto/Getty Images hide caption

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Aditya Irawan/NurPhoto/Getty Images

Malassezia is a genus of fungi naturally found on the skin surfaces of many animals, including humans. The researchers found it in urban apartments, although some strains have been known to cause infections in hospitals. Science Source hide caption

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Science Source

The preliminary results described Wednesday come from two patients with multiple myeloma and one with sarcoma. This was just a first safety test, the scientists say, and was not designed to measure whether such a treatment would work. Jure Gasparic/EyeEm/Getty Images hide caption

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Jure Gasparic/EyeEm/Getty Images

CRISPR Approach To Fighting Cancer Called 'Promising' In 1st Safety Test

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The Great Pretender: The Undercover Mission That Changed Our Understanding of Madness, by Susannah Cahalan Grand Central Publishing hide caption

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Grand Central Publishing

During deep sleep, waves of cerebrospinal fluid (blue) coincide with temporary decreases in blood flow (red). Less blood in the brain means more room for the fluid to carry away toxins, including those associated with Alzheimer's disease. Fultz et al. 2019 hide caption

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Fultz et al. 2019

How Deep Sleep May Help The Brain Clear Alzheimer's Toxins

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Common vampire bats (Desmodus rotundus), such as this group day-roosting in a cave in Mexico, can form cooperative, friendship-like social relationships. B.G. Thomson/Science Source hide caption

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B.G. Thomson/Science Source

For These Vampires, A Shared Blood Meal Lets 'Friendship' Take Flight

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At Chicago's McCormick Place, neuroscientists from around the world presented their work to colleagues. But some researchers were denied entry because of the Trump administration's travel ban. Rob Piercy/Allen Institute hide caption

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Rob Piercy/Allen Institute

U.S. Travel Ban Disrupts The World's Largest Brain Science Meeting

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Though there are websites, hotlines, therapists and coaches to help teens manage nicotine cravings, there's been little research to show what works best. Recently, some programs have turned to texting to help kids find resources specific to vaping cessation. Towfiqu Photography/Getty Images hide caption

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Towfiqu Photography/Getty Images

Teen Vapers Who Want To Quit Look For Help Via Text

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A blood transfusion bag hangs in an operating room in a hospital in the Republic of Congo. Most countries in sub-Saharan Africa have a huge gap between blood supply and demand, new research found. Godong/Universal Images Group/Getty Images hide caption

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Godong/Universal Images Group/Getty Images

Scientists are exploring a new technique, called prime editing, that is more precise than CRISPR and which uses certain enzymes, including reverse transcriptase, to edit DNA. Evan Oto/Science Source hide caption

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Evan Oto/Science Source

Scientists Create New, More Powerful Technique To Edit Genes

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A rhesus macaque monkey grooms another on Cayo Santiago, off the eastern coast of Puerto Rico. Brennan Linsley/AP hide caption

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Brennan Linsley/AP

A PET scan shows metabolism of sugar in the human brain. Science Source hide caption

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Science Source

Keeping Your Blood Sugar In Check Could Lower Your Alzheimer's Risk

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Though complications from the flu can be deadly for people who are especially vulnerable, including pregnant women and their newborns, typically only about half of pregnant women get the needed vaccination, U.S. statistics show. BSIP/Getty Images hide caption

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BSIP/Getty Images

Get Your Flu Shot Now, Doctors Advise, Especially If You're Pregnant

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Scientists use a microscope to see if the genetic modification is spreading. Immature modified mosquitoes glow red with yellow eyes when illuminated with a laser. Pierre Kattar for NPR hide caption

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Pierre Kattar for NPR

A recent study looked at funding rates for R01 grant applications, which are designed to support "health-related research and development based on the mission of the NIH." In general, population-based projects were less likely to be funded than explorations of cellular mechanisms, the study found. Will & Deni McIntyre/Science Source hide caption

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Will & Deni McIntyre/Science Source

Unlike most dairy cows in America, which are descended from just two bulls, this cow at Pennsylvania State University has a different ancestor: She is the daughter of a bull that lived decades ago, called University of Minnesota Cuthbert. The bull's frozen semen was preserved by the U.S. Agriculture Department. Dan Charles/NPR hide caption

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Dan Charles/NPR

Most U.S. Dairy Cows Are Descended From Just 2 Bulls. That's Not Good

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