Annette sharpens her skydiving skills in a vertical wind tunnel in Slovakia. The wind reaches a speed of 180 kilometers per hour (112 mph).

Sigrid gives a quick explanation of what Yabla is and how the Yabla player works.

A reading of Tomie dePaola's The Story of the Three Wise Kings, which makes use of his richly colored illustrations for the visuals. He is widely known as a writer and illustrator of children's books. He is the creator of the Barney & Friends TV series and the immensely popular Strega Nona storybook series.

January 6 commemorates the day that three dudes gave a bunch of gifts to baby Jesus. But... who were they and why did they have hipster beards?

Writer and star of the Broadway musical In the Heights, Lin-Manuel Miranda performs "The Hamilton Mixtape" at the White House Evening of Poetry, Music, and the Spoken Word. Accompanied by Alex Lacamoire.

The consonant "Q" is a special letter. We almost never find it without a "U" following it. Sigrid gives us plenty of examples of how it's used.

Sigrid talks about some of the important aspects of the Christmas season: light, scents, food, and good company.

This is a public service announcement of the Obama administration on ending sexual assault. President Obama is joined by Vice President Biden, Daniel Craig, Benicio Del Toro, Dulé Hill, Seth Meyers and Steve Carell.

Most of the time "P" is simply pronounced like a "P," but there are a few cases in which "P" is silent. Sigrid gives us plenty of examples of handy words with "P."

Annette explains three more colloquial contractions people use in everyday conversation: gotta [got to], gotcha [got you], and dunno [don't know]. She also gives us examples in context.

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.

As writer and tour guide Susie Millar tells us about some of Northern Ireland's attractions, such as the Titanic museum and the incredibly beautiful Causeway Coastline, you won't want to wait any longer to buy a ticket for Belfast.

The letter "O" is a tricky vowel, because there are several ways to pronounce it, both when it's single and when it's double!

Like the letter "M," "N" is almost singable. Sigrid gives you some tips about some very important words containing the letter "N."

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