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."

Red simply doesn't want to wake up for school! David struggles to get him out the door, but there is something important that he is forgetting...

Barney never fails to impress the group with the lengths he'll go in order to get a woman interested in him.

The song "Airplanes" is a collaboration between American rapper B.o.B, and Hayley Williams, lead singer of American pop punk band Paramore. Enjoy!

Beyoncé performs "Single Ladies (Put a Ring on It)" live in Central Park as part of the Good Morning America 2011 Summer Concert Series.

When wolves were reintroduced to Yellowstone National Park in the United States after being absent nearly 70 years, the most remarkable "trophic cascade" occurred. What is a trophic cascade and how exactly do wolves change rivers? George Monbiot explains the process.

From their sixteenth album "Emergency," released in 1984, here is American band Kool and the Gang with their hit "Fresh."

Watch the official video for Justin Bieber's 2010 hit song "Baby," in collaboration with Ludacris. This video has both been YouTube's most watched, and most disliked video of all time. Enjoy.

Andrew McCarthy goes on a wild goose chase looking for a gravity hill in Ireland, and in the process shows us the charm of the Irish countryside.