Extras
The False Promise of Cloning Your Pet
Cloning has come a long way since Dolly the sheep, but it still has limits.
The False Promise of Cloning Your Pet
This Device Smells Diseases by Imitating a Dog's Nose
Researchers at MIT create an electronic nose using chemical odor sensors.
This Device Smells Diseases by Imitating a Dog's Nose
War Threatens Ukrainian Nuclear Power Plants
Ukraine's 15 active nuclear reactors generate about half of the country's electricity.
War Threatens Ukrainian Nuclear Power Plants
Animal-to-Human Organ Transplants
In a first, a 57-year-old man received a heart transplant from a genetically modified pig.
Animal-to-Human Organ Transplants
What is 5G, and is it Safe to Use on Planes?
The 5G signal works in a fundamentally different way from 4G.
What is 5G, and is it Safe to Use on Planes?
Introducing NOVA's Financial Lab
Practice making financial decisions by taking care of your pet through three mini-games.
Introducing NOVA's Financial Lab
Can South Carolina's Salt Marshes Be Saved?
Many seafood dishes depend on an ecosystem that's easy to overlook: The salt marsh.
Can South Carolina's Salt Marshes Be Saved?
From Prison to Careers in STEM
Watch how four accomplished scientists began their careers or education in prison.
From Prison to Careers in STEM
Could Antiviral Pills Change the Course of the Pandemic?
The FDA authorized use of the first antiviral pills to treat COVID-19 at home.
Could Antiviral Pills Change the Course of the Pandemic?
The farther away a galaxy is, the redder it appears to our telescopes.
Why Distant Galaxies Look Red
Ultimate Space Telescope Preview
Discover how NASA engineers built and launched the most ambitious telescope of all time.
Ultimate Space Telescope Preview
NASA Reacts to the James Webb Space Telescope Images
This NASA team was the first to see the new James Webb Space Telescope images.
NASA Reacts to the James Webb Space Telescope Images
How Scientists Created JWST's First Test Image
A test image from the James Webb Space Telescope unexpectedly captured many galaxies.
How Scientists Created JWST's First Test Image
Ancient footprints provide new evidence of humans and extinct giant beasts of the Ice Age.
Ice Age Footprints Preview
Humans May Have Lived in North America Earlier Than Thought
Scattered seeds help reveal when ancient humans first left footprints in North America.
Humans May Have Lived in North America Earlier Than Thought
The Crash That Shut Down the Global Economy, Explained
The Suez Canal is one of the most important shipping lanes in the world.
The Crash That Shut Down the Global Economy, Explained
Watch Scientists Extract a Rare Turtle Fossil
The Late Cretaceous period was kind of the heyday of turtles.
Watch Scientists Extract a Rare Turtle Fossil
New Fossil May Reveal Clues to Dinosaurs' Final Days
This might be the first time in 66 million years that this leg has seen the light of day.
New Fossil May Reveal Clues to Dinosaurs' Final Days
Inside a Fossilized Pterosaur Egg
Bones and shells can tell us a lot about how these creatures lived.
Inside a Fossilized Pterosaur Egg
Dinosaur Apocalypse: The New Evidence Preview
Striking new fossils paint a picture of life right before the asteroid impact.
Dinosaur Apocalypse: The New Evidence Preview
Dinosaur Apocalypse: The Last Day
Scientists use new fossils to reconstruct the day the dinosaurs died.
Dinosaur Apocalypse: The Last Day
How an Alzheimer’s study reached Black communities
Getting Black individuals involved in a study requires more than just asking them.