"One" and "ones" can replace nouns, but are not pronouns. They are prop words. Let's look at how they are used.

Taylor Swift teams up with British singer Ed Sheeran and American rapper Future for this song "End Game," the video for which was shot in Miami, Tokyo, and London.

Natalie Fee concludes her Ted Talk with a few suggestions for what we can do to reduce how much single-use plastic we are sending into the earth's waterways.

"China Girl" was originally co-written by David Bowie and Iggy Pop when they lived in Berlin. Although there are many interpretations of the song's meaning, the video particularly looks at and parodies Asian female stereotypes.

In Yellowstone Park, visitors can see many indigenous animals in their natural habitat and wonder at the park's natural hot springs.

The song "Run" is from Irish band Snow Patrol's album "Final Straw." The video features frontman Gary Lightbody in a forest at nighttime.

Lindsey Vonn describes her early days on the slopes, the encouragement she received from her father, and coming back from the many injuries she has endured on her way to becoming a champion skier. She also talks about her decision to compete against men in alpine skiing.

“Don't Answer Me” is a song by Alan Parsons and Eric Woolfson, the British duo behind the Alan Parsons Project. This is their first music video, which features an award-winning animation by Michael Kaluta, inspired by 1930s comic strips.

Geysers represent a very popular tourist attraction in Yellowstone Park. How do they work and where do they come from? And what is sandstone? The video answers these questions.

Watch some coverage of the People's Climate March that was timed to coincide with the UN Climate Summit in New York City. The march was attended by 400,000 people.

This song was written and sung by Bob Dorough. It teaches about the multiplication of 5 through a game of hide and seek, in which the seeker counts by fives.

Prince narrates a one-night stand with a beautiful but promiscuous woman (the "Little Red Corvette" of the title). He uses several other automobile metaphors in the song.

In this segment, we learn about the role weather plays in the creation of rock formations in the national parks of the United States.

Singer-songwriter Meghan Trainor's latest hit connects to the #metoo movement and the problem of men not paying attention to the boundaries set by women.

Ed Sheeran described this romantic ballad as a "walking down the aisle song." In the video, he executes a ballroom dance with Brittany Cherry, a contestant from the televised American dance competition, So You Think You Can Dance. While on concert tour, Sheeran spent five hours a day for three weeks to practice with Cherry.