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Marijuana plants grow in a marijuana cultivation facility on July 6, 2017 in Las Vegas, Nevada. Ethan Miller/Getty Images hide caption

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Ethan Miller/Getty Images

Cannabis 101 At The University Of Connecticut

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A biomechanical model of producing an "f" sound with an overbite (left) compared with an edge-to-edge bite (right). Some linguists are arguing that the advent of softer food thousands of years ago led to changes in biting patterns and, eventually, to more frequent use of sounds like "f" and "v" in human languages. Scott Moisik hide caption

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Scott Moisik

There was an uproar in 2018 when a scientist in China, He Jiankui, announced that he had successfully used CRISPR to edit the genes of twin girls when they were embryos. Prominent scientists hope to stop further attempts at germline editing, at least for now. Mark Schiefelbein/AP hide caption

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Mark Schiefelbein/AP

Scientists Call For Global Moratorium On Creating Gene-Edited Babies

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An artist's rendering shows a needle-like carbon nanotube delivering DNA through the wall of a plant cell. It also may be possible to use this method to inject a gene editing tool called CRISPR to alter a plant's characteristics for breeding. Courtesy of Markita del Carpio Landry hide caption

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Courtesy of Markita del Carpio Landry

Scientists Thread A Nano-Needle To Modify The Genes Of Plants

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Jonah Reeder prepares a special protein shake that helps him manage a metabolic condition called phenylketonuria. Julia Ritchey/KUER hide caption

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Julia Ritchey/KUER

A Gulp Of Genetically Modified Bacteria Might Someday Treat A Range Of Illnesses

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This colorized scanning electron micrograph shows human cells in a lab infected with "pink" influenza viruses. As many as 650,000 people each year die from flu, according to the World Health Organization. Steve Gschmeissner/Science Source hide caption

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Steve Gschmeissner/Science Source

The common practice of double-booking a lead surgeon's time and letting junior physicians supervise and complete some parts of a surgery is safe for most patients, a study of more than 60,000 operations finds. But there may be a small added risk for a subset of patients. Ian Lishman/Getty Images hide caption

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Ian Lishman/Getty Images

Are awards a more effective motivator than a cash prize? Economist Bruno Frey says yes. Mint Images/Getty Images/Mint Images RF hide caption

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Mint Images/Getty Images/Mint Images RF

One of the first images of a living Wallace's giant bee was captured after a recent rediscovery of the world's largest bee in Indonesia. As this composite image illustrates, the bee is approximately four times larger than a European honeybee. Clay Bolt/claybolt.com hide caption

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Clay Bolt/claybolt.com

Genetically modified "gene drive" mosquitoes feed on warm cow's blood. Scientists hope these mosquitoes could help eradicate malaria. Pierre Kattar for NPR hide caption

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Pierre Kattar for NPR

Scientists Release Controversial Genetically Modified Mosquitoes In High-Security Lab

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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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