Why do Koreans have two different ages?
Adults World
A Korean baby born on Dec. 31 turns two years old the next day. Here's why.
Why China is putting robots in nursing homes
Adults World
China has more than 230 million senior citizens. To keep them company, it's encouraging nursing homes to buy companionship robots.
Cairo: MEGACITY of the Middle East
Adults World
Cairo, Egypt is the capital of the Arab world and the largest desert city on the planet. For centuries it has thrived alongside the Nile, the world's longest river.
Most hurricanes that hit the US come from the same exact spot in the world
Adults World
As Hurricane Irma bears down on the East coast, Floridians may be wondering where all the hurricanes come from, and why they all follow a similar course. In fact, Irma, Harvey, and Jose were all born on the other side of the Atlantic, off the coast of Africa, and the Sahara desert may be to blame.
What Happens If We Bring the Sun to Earth?
Adults World
What happens if we bring the sun to earth? No, seriously.
World's 10 Most Generous Countries
Adults World
The top ten countries on the World Giving Index, determined by a worldwide poll of three factors: helping a stranger, donating money, and volunteering.
Will the ocean ever run out of fish? - Ayana Elizabeth Johnson and Jennifer Jacquet
Adults World
When most people think of fishing, we imagine relaxing in a boat and patiently reeling in the day's catch. But modern industrial fishing -- the kind that stocks our grocery shelves -- looks more like warfare. Ayana Elizabeth Johnson and Jennifer Jacquet explain overfishing and its effects on ecosystems, food security, jobs, economies, and coastal cultures.
The World's Largest Airport | China's Future MEGAPROJECTS: Part 3
Adults World
China is building the world's largest airport, the Beijing Daxing International Aiport, to serve the Jing-Jin-Ji megalopolis.
Why Chinese Manufacturing Wins
Adults World
This video explains why Chinese manufacturing takes the first place worldwide.
How Do Glaciers Move?
Adults World
Glacier ice is weird. It's solid. Solid things aren't supposed to flow. But glacier ice flows like a liquid, and it does that without melting! How is this possible? I traveled to Mendenhall Glacier in Juneau, Alaska to find out.
MEGACITIES: Crisis in CDMX
Adults World
Mexico's vast capital - Ciudad de Mexico, the largest city in the Americas - is threatened by a severe water crisis.
More ice is about to break off of Antarctica - and it's what scientists feared most
Adults World
The giant crack that's been racing across Antarctica Larsen C ice shelf finally met its breaking point between July 10 and 12. The result was an iceberg the size of Delaware and weighing a trillion metric tons.
The History of Hong Kong
Adults World
Its name means "fragrant harbor" in Chinese, but it could also mean city of change. This is the story of Hong Kong.
What Would Happen in an Apocalypse... According to Science
Adults World
Most people think the apocalypse would bring violence, crime, and selfishness. But according to scientists, that's just not realistic.
Overpopulation - The Human Explosion Explained
Adults World
In a very short amount of time the human population exploded and is still growing very fast. Will this lead to the end of our civilization?
The ferocious predatory dinosaurs of Cretaceous Sahara - Nizar Ibrahim
Adults World
In Cretaceous times (around 100 million years ago), North Africa was home to a huge river system and a bizarre menagerie of giant prehistoric predators -- including the Spinosaurus, a dinosaur even more fearsome than the Tyrannosaurus rex. Nizar Ibrahim uses paleontological and geological data to reconstruct this "River of Giants" in surprising detail.
Wait... Is China Really the Leader in Green Energy?
Adults World
With plans to pull out of the Paris climate deal, the US is quickly falling behind in the race for clean energy. So who's winning?