Jimmy Fallon can't believe he's at the White House on the Fourth of July. Watch part of his stand-up performance from that evening in which he does impressions of ten other comedians!

The great white shark and killer whale are both infamous marine predators. Normally they leave each other alone, but one day, biologists off the cost of California witness something unprecedented.

In this week's Lightning Round, Neil Patrick Harris and Billy Eichner take to the streets to find out how New Yorkers feel about the end of the series How I Met Your Mother.

Travel + Leisure editor Sarah Spagnolo takes us to hotels, new restaurants, and beautiful beaches of Santa Barbara, California.

Several boats converge near the largest of the Farallon Islands when killer whales are spotted. But what they think is a young killer whale turns out to be a great white shark.

Dana explains everything you wanted to know about community college, as well as how difficult it is to switch majors once you've started. Your remaining questions about universities in the United States will surely be answered, and make sure you stick around for the blooper reel at the end!

Watch Academy Award winner Julianne Moore ambush innocent tourists with her acting ability in the hopes of making some tip money in Times Square! Forget Elmo, Spiderman and the other random characters tourists take pictures with in New York, this is Julianne Moore!

"You're a fishmonger!" By taking a closer look at Shakespeare's words, and particularly his insults, we can see why he is known as a master playwright whose works appeal to audiences all over the world.

Theresa May gives her first speech as Britain's new prime minister, outlining her priorities for the UK with a focus on domestic issues.

David and Ben Crystal explain why Shakespeare verses read with Original Pronunciation convey very different emotions and open up another level of understanding.

Seattle artist Matt Sellars shows off the Clovis Point, a skateboard of his own design. Check out a few scenes from its construction and test drive!

In this episode of SciShow Kids, Jessi talks about how solar eclipses occur, and why they can only be seen from certain locations.

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.

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

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