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The winners of the 2019 Nobel Prize in physiology or medicine are Gregg Semenza of the U.S., Peter Ratcliffe of Britain and William Kaelin of the U.S. They're seen here on a screen during a news conference at the Karolinska Institute in Stockholm.

Trio Wins Nobel Prize In Physiology Or Medicine For Work On Cells And Oxygen

The three physicians "found the molecular switch that regulates how our cells adapt when oxygen levels drop," a member of the Nobel Committee said.

CRISPR and other gene technology is exciting, but shouldn't be seen as a panacea for treating illness linked to genetic mutations, says science columnist and author Carl Zimmer. It's still early days for the clinical applications of research.

A Science Writer Explores The 'Perversions And Potential' Of Genetic Tests

Carl Zimmer wondered what secrets lurked in his genetic code — so he decided to have his genome sequenced. He writes about the implications of the study of genetics in She Has Her Mother's Laugh.

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.

Call For Global Moratorium On Creating Gene-Edited Babies

An international group of 18 prominent scientists and bioethicists is calling for countries around the world to impose a moratorium on the creation of babies whose genes have been altered in the lab.

A TV report in South Korea uses file footage of North Korean leader Kim Jong Un, who supervised the test-firing of a "new-type tactical guided weapon" on Wednesday.

North Korea Announces Testing Of New 'Tactical Guided Weapon'

The country's official newspaper reported leader Kim Jong Un supervised the test and is continuing to upgrade his country's military. North Korea also demanded Mike Pompeo not participate in talks.

Joan Garcia became pregnant at 14 and gave birth at 15. She and her child travel by raft between the two shacks where they live in Navotas fish port on Manila Bay.

PHOTOS: Why The Philippines Has So Many Teen Moms

Over a 10-year period, 1.2 million Filipina girls between the ages of 10 and 19 have had a child. The government is trying to change things. But the pandemic has made matters worse.

To help protect the planet and promote good health, people should eat less than 1 ounce of red meat a day and limit poultry and milk, too. That's according to a new report from some of the top names in nutrition science. People should instead consume more nuts, fruits and vegetables, legumes, and whole grains, the report says. The strict recommended limits on meat are getting pushback.

This Diet Is Better For the Planet. But Is It Better For You, Too?

Less than a half-ounce of red meat per day: That's how much a new report says we should eat to meet nutritional needs and help save the planet. Americans on average now eat four to six times as much.

Attendees hold "We Vape, We Vote" signs ahead of a Trump rally last month in Dallas. The politics surrounding vaping and industry pushback against regulation appear to have derailed the Trump administration's plan to ban the sales of many vaping products.

Politics, Industry Backlash Stall White House Ban On Flavored Vaping Products

In September, the Trump administration said it would ban all flavored e-cigarette products in an effort to reduce the youth vaping epidemic. Since then, there's been no movement toward implementation.

Tigers (Panthera tigris) are the biggest of all the cats - from the giant Siberian tigers that roam the frozen boreal forest of Russia, to the secretive swamp tigers of the Indian Sundarbans that bathe in seawater and patrol muddy shores. In the early 20th century, 100,000 tigers reigned across Asia and Europe, but today there are fewer than 4,000 in the wild.

SUPER CATS On NATURE

Wednesdays, July 28 - Aug. 11, 2021 at 8 p.m. on KPBS TV + Sundays, Aug. 1 - 15 at 8 p.m. on KPBS 2 / On Demand

Dr. Nancy Jaax (Julianna Margulies) finds Dr. Peter Jahrling (Topher Grace) and shakes him awake to make sure he is OK during the Ebola investigation.

A NatGeo TV Drama Is 'Inspired' By A 1989 Ebola Crisis In The U.S. How Accurate Is It?

'The Hot Zone,' a miniseries on the National Geographic Channel, was "inspired" by a 1989 Ebola crisis in the U.S. We asked virologist Thomas Geisbert, who was on the scene.

Using embryonic stem cells, researchers created a structure that mimics the earliest stages of human development in the womb. This image shows the structure breaking the symmetry of the sphere, which starts the development of more complex structures that eventually develop into a fetus.

Scientists Make Model Embryos From Stem Cells To Study Key Steps In Human Development

Researchers hope these "embryoids" could provide crucial new insights into how to treat infertility and prevent miscarriages, birth defects and many diseases. But they stir ethical concerns.

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