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

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

"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.

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.

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

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

"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.

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!

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

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.

For the body and the mind: Try out some knee exercises and learn some new vocabulary related to posture and fitness. Enjoy!

"Roxanne" is a song by English rock band The Police. Written by lead singer and bassist Sting, the song was released as a single from their debut album Outlandos d'Amour. It was written from the point of view of a man who falls in love with a prostitute.

From time to time, we give celebrities a chance to read some of the mean things people tweet about them. We extended that same offer to our Commander in Chief, who happily agreed. This is an all President Obama edition of #MeanTweets.

British singer Ellie Goulding visits radio station 104.3 MYfm in Los Angeles to deliver an exclusive live performance for a few lucky listeners.

This video shows us that Shakespeare invented over 2000 new words and phrases, such as "eyeball," "anchovy," and "puppy."