This quirky ad from New Zealand Air employs characters from J. R. R. Tolkien's Middle-earth trilogy. Enjoy!

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.

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.

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

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

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.

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!

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!

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

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.

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.

Orcas are at the top of the food chain, but it is unprecedented that they would go after a great white shark. From the boat, whale watchers and experts alike are shocked by what they see.

Actors Neil Patrick Harris and Cobie Smulders sit down with Entertainment Weekly to talk about the relationship between their characters Barney and Robin on the show How I Met Your Mother.