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!

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.

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

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.

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.

Over the course of human history, thousands of languages have developed from what was once a much smaller number. How did we end up with so many? And how do we keep track of them all? Alex Gendler explains how linguists group languages into language families, demonstrating how these linguistic trees give us crucial insights into the past.

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!

Learn about the states of matter, solids, liquids and gases, how they're different and where they're found in everyday life.

American singer Christina Perri sings her hit "Jar of Hearts," a song about heartbreak. She is a rising star in the United States and ready to take on the world at large.

Sigrid talks about some of the ways she learned how to speak Italian and French.

We all know that whales are endangered due to hunting and pollution, but do you know how important they are for the ocean and the environment? This video shows how essential a healthy population of whales is to the ocean ecosystem. Creative Commons Attribution license (reuse allowed). Video was not modified. Please visit sustainablehuman.org for credits and more information.

With the Rainforest Alliance certification, everyday purchases can help prevent deforestation and climate change, protect wildlife, alleviate poverty and transform business practices. Choose products with the seal of the green frog when purchasing coffee, cocoa, tea, flowers, fruit, paper, and wood products.

Taylor Swift reflects back on the tour for her album 1989, which was attended by over two million fans. Featuring behind the scenes footage and performances of the song "New Romantics."

Have you ever wondered why English seems to have roots in so many different languages? Here is a look at what words the Anglo-Saxons and Vikings brought to the English language.