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Several circular herpes virus particles are seen near a cell membrane. Roseola herpes virus causes a childhood illness marked by skin rashes and now has been found in brains with Alzheimer's disease. NCI/Science Source hide caption

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NCI/Science Source

Researchers Find Herpes Viruses In Brains Marked By Alzheimer's Disease

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In these two two-cell mouse embryos, the surface of the embryos is outlined in orange, the DNA in the nucleus is indicated in blue and the activity of the LINE-1 gene is indicated via bright red spots. Ramalho-Santos lab/UCSF hide caption

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Ramalho-Santos lab/UCSF

Some DNA Dismissed As 'Junk' Is Crucial To Embryo Development

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A 4-year-old Honduran girl carries a doll while walking with her immigrant mother. Both were released Sunday from federal detention in McAllen, Texas. Loren Elliott/AFP/Getty Images hide caption

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Loren Elliott/AFP/Getty Images

Separating Kids From Their Parents Can Lead To Long-Term Health Problems

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Dr. Atul Gawande has been picked to lead the high-profile joint venture in health care formed by Amazon, Berkshire Hathaway and JP Morgan Chase. Mint/Hindustan Times via Getty Images hide caption

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Mint/Hindustan Times via Getty Images

Atul Gawande: Medicine Has Become A Team Sport.

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Border Patrol agents take a father and son from Honduras into custody near the U.S.-Mexico border. The asylum seekers were then sent to a U.S. Customs and Border Protection processing center for possible separation. John Moore/Getty Images hide caption

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John Moore/Getty Images

A Pediatrician Reports Back From A Visit To A Children's Shelter Near The Border

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Main Street in McArthur in Vinton County, Ohio. Though the opioid crisis endures in Ohio, the problem is now compounded by the resurgence of methamphetamine addiction. Arezou Rezvani/NPR hide caption

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Arezou Rezvani/NPR

Teachers See the Effects of the Opioid Crisis On Children

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Karin Bruwelheide handles an amputates limb that dates back to the Civil War. The bones were discovered by scientists at Manassas National Battlefield Park in Virginia. Scientists at the Smithsonian Institution's National Museum of Natural History have been analyzing the bones to learn more about them and who they may have belonged to. Meredith Rizzo/NPR hide caption

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Meredith Rizzo/NPR

Civil War Battlefield 'Limb Pit' Reveals Work Of Combat Surgeons

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A study finds light drinkers have the lowest combined risk of getting cancer and dying prematurely — lower than nondrinkers. Alcohol is estimated to be the third-largest contributor to overall cancer deaths. Westend61/Getty Images hide caption

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Drinking Alcohol Can Raise Cancer Risk. How Much Is Too Much?

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Canada's House of Commons voted to legalize recreational marijuana use, sending the bill to the Senate. In this photo from April 20, smoke rises during the annual 4/20 marijuana rally on Parliament Hill in Ottawa, Ontario. Chris Wattie/Reuters hide caption

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Chris Wattie/Reuters

Modern tools of biology could allow someone to recreate a dangerous virus, such as smallpox, from scratch. Dr. Hans Gelderblom/Visuals Unlimited/Getty Images hide caption

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Dr. Hans Gelderblom/Visuals Unlimited/Getty Images

Report For Defense Department Ranks Top Threats From 'Synthetic Biology'

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WHO Recognizes Gaming Disorder As A Mental Health Condition

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Kelly Zimmerman holds her son Jaxton Wright at a parenting session at the Children's Health Center in Reading, Pa. The free program provides resources and social support to new parents in recovery from addiction, or who are otherwise vulnerable. Natalie Piserchio for NPR hide caption

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Natalie Piserchio for NPR

Beyond Opioids: How A Family Came Together To Stay Together

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