The letter "S" has a couple of different sounds. It's a very important letter because it's used to form the plural of many nouns as well as the third person singular of verbs.

In the first of a new TED-Ed series designed to catalyze curiosity, TED Curator Chris Anderson shares his boyhood obsession with quirky questions that seem to have no answers.

Optimus Search helps companies find the right people for the job in the specific fields of Life Science, Engineering, Digital, and Energy. The consulting firm considers itself the best in the business.

Experience kiteboarding on a secluded beach in Kenya with Hawaii-native and world-class kiteboarder Shawn Richman. Lamu Island's Kizingoni Beach is the perfect spot for Shawn to let go in the wind and the waves.

A look at the communications of Humpback Whales and other baleen whales, which includes how they sing, why they sing, and why we might consider their vocalizations actual songs.

The letter "R" is difficult to pronounce for lots of people, even native speakers. Sigrid shows us how "R" sounds in different kinds of words.

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."