Sigrid talks about some of the ways she learned how to speak Italian and French.

Tara’s recipes: Tara de la Motte creates a perfect selection of traditional English afternoon tea sandwiches.

The salmon that make it upstream mate and then die of exhaustion. Meanwhile, many other animals are lurking and waiting to feed.

When wolves were reintroduced to Yellowstone National Park in the United States after being absent nearly 70 years, the most remarkable "trophic cascade" occurred. What is a trophic cascade and how exactly do wolves change rivers? George Monbiot explains the process.

Come along with Anna as she tours Covent Garden, St. Paul's Church and Neal's Yard, all in London, while telling of Christmas traditions for Londoners as they relate to these locations.

Seattle artist Matt Sellars shows off the Clovis Point, a skateboard of his own design. Check out a few scenes from its construction and test drive!

Visit New York City's Union Square Holiday Market. Meet the people there. Hear the sounds, see the sights and enjoy what has become a popular Christmas tradition!

Take an exclusive journey through Middle-earth with the cast of The Hobbit: An Unexpected Journey.

Rozalia Project knows all about marine debris. Do you? Take a look at their wrap-up video from Expedition CLEAN on the Gulf of Maine in August of 2014.

Dana: Six funny ways you know you're in the U.S. that I noticed while back over there this past January.

Part Two of an exclusive journey through Middle-earth with the cast and crew of The Hobbit: An Unexpected Journey. Enjoy!

It is some men's great dream to explore the world. Today we present Solar Impulse 2, an aircraft, powered only by the sun that will attempt the first solar flight around the world. What is Solar Impulse? The only airplane of perpetual endurance, able to fly day and night on solar power, without a drop of fuel. Get more information here about the project.

At times, Doc Gruber's research requires the team to dive right into shark-infested waters! Their line of work certainly isn't for the faint of heart! Enjoy.

Nathalie and Jim get up close and personal with tiger and lemon sharks, trying to get the best footage while taking care not to disturb or excite the dangerous animals.

Sigrid begins her tale of how she ended up in Italy, where she's now living. She was born in Minneapolis and raised in New York. As a young adult, she relocated to Switzerland in order to study early music. In this video, she talks about traveling to Europe for the first time and learning about the different genres of music prior to the classical era.