Why would a killer whale go after a great white shark? Enter Alisa Schulman-Janiger, a biologist who is very familiar with the different families of killer whales off the coast of California.

Steve Skaith sings "The Men Below," a song about a mining strike in England in the 1980s.

If you don't feel like putting the time and effort into baking a whole cake, then try the fantastically fun and simple Two Minute Mug Cakes! All you need is a microwave, a mug, and a few ingredients, and you have an instant treat to enjoy on your own or to make for your best friends!

"Just Give Me a Reason" is a song recorded by American singer and songwriter Pink, featuring Nate Ruess of the band Fun. It is a pop ballad about the desire to hold on to a relationship even when it appears to be breaking down.

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

In 1066, William the Conqueror invaded Britain and brought with him fancy French words to add to the English language.

American adult animated sitcom "Family Guy" has been nominated for and won many awards. In this scene, Peter brings home an unexpected new pet for the family.

"Shake It Off" is a song recorded by American singer-songwriter Taylor Swift for her fifth studio album. It is an uptempo dance-pop track that signified a departure from her earlier country-influenced pop.

Dido is a multi-platinum British singer and songwriter. The single “White Flag" is one of her best known songs.

Our friends at Numberphile provide a detailed look at how the game Connect Four is won or lost.

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

Join Minoo and Rachel, who each have their own YouTube channel devoted to improving English pronunciation, as they come together to compare British and American English pronunciation.

Walk the Moon is an American pop rock band assembled by singer Nicholas Petricca. "Shut up and Dance" was their first major hit.

"Wake Me Up When September Ends" by American punk band Green Day was written by frontman Billie Joe Armstrong. Although the central theme of loss is illustrated in the video by a relationship broken apart by war, Armstrong wrote it about the death of his father.

So if an orca attacking a shark is so rare, how do they usually behave? In this segment, we learn about how orcas around the world live and hunt.