UNICEF Goodwill Ambassador Katy Perry delivers a special weather report on the devastating effects of climate change for the world’s children.

There is a lot of talk about how 3D printing could revolutionize the way that we make stuff. But what is 3D printing and how does 3D printing allow us to make almost anything from nothing? Professor Tim Minshall, Head of the Institute for Manufacturing at the University of Cambridge, explains it in this video, which is targeted at school-age students.

The University of Cambridge is one of England's greatest universities. There's no main campus – instead, the university's many colleges are scattered throughout the charming town center. Many colleges welcome the public to browse around.

George Evageliou of Urban Homecraft shows us a dresser he made that’s inspired by traditional Shaker furniture designs.

Have you ever been unsure as to how elections work in the US on a federal and state level? This video explains it all.

Voters in New York City talk about what they fear in a Trump presidency.

Department of Homeland Security: This video will help you understand US-VISIT, the layer of security that uses biometrics, such as digital fingerprints, to establish and verify international travelers' identities. US-VISIT procedures apply to international travelers holding a non-U.S. passport or visa.

At the University of Sydney, physicist Derek Muller explores the possibility of an anti-gravity wheel through a series of field tests.

In the SEASON THREE PREMIERE of Victorious, the crew may be serving a Saturday in detention, but they make weekend school look cool!

Greentraveller's Richard Hammond shows you some of the loveliest and greenest spots in London, and gives some tips for navigating through the city.

Mark King of the band Level 42 is a tourism ambassador for the Isle of Wight. Here he explains why.

Enjoy clips from ​the most popular musicals in London's world-famous West End. Les Misérables is the longest​-​running ​musical ​in this top ten group​, and of all time, in the West End.

Take a look at London's most popular attractions based on visitor numbers. From museums to family-friendly attractions and World Heritage Sites, London has something for everyone. The Parthenon marbles, the Crown Jewels, and the Cutty Sark clipper ship are among London's must sees. A great thing about London is that so many museums have free admission.

We meet a young woman, Caralie, on the street. She takes us to her apartment building. She checks her mail-box. She invites us inside and up the stairs to her third-floor apartment.

Caralie takes us into her kitchen. Here she talks about fruits, vegetables and preparing soup. She also shows us some important appliances in her kitchen.