Rozalia Project knows all about marine debris. Do you? Take a look at their wrap-up video from Expedition CLEAN on the Gulf of Maine in August of 2014.

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!

On a sunny fall day, Jessica, who lives in Brooklyn, introduces her neighborhood and gives us a tour of the best sights.

In this video our friend Anna tells us how they celebrate Christmas in Britain. Enjoy!

This is the end product, the video put together to go with PS 127's (a Queens New York public middle school) recording of "Rise Up and Sing," a song their chorus teacher wrote for them and helped them record at Avatar Studios in Manhattan.

In summer, mother bears and their young cubs can be spotted on the plains near Hallo Bay in Alaska's Katmai National Park.

This video will teach you the different pronunciations of the word "the" in American English and when they are used.

When Penny returns from visiting her family in Nebraska, Leonard is happy to see her. Sheldon, however, is much less welcoming when he learns that her family has the flu.

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

Visit New York City's Union Square Holiday Market. Meet the people there. Hear the sounds, see the sights and enjoy what has become a popular Christmas tradition!

Planning on flying during the Christmas season? Then watch this useful clip from Delta Airlines. It contains in-flight passenger safety instructions... with a touch of holiday cheer!

In this final installment of the series, a white Kermode bear encounters a black bear while fishing. Observe their behavior. Look and see for yourself what ensues!

President Barack Obama made fun of Donald Trump during his comedy routine at the White House Correspondents' Dinner in 2011 after Trump arrogantly had taken credit for the release of the President's long-form birth certificate earlier in the week.

Penny invents a quiz to find out whether Sheldon or Leonard is smarter, which only reveals that both of them are completely uninformed about popular culture with the exception of Star Trek.

MAGIC! is a Canadian reggae fusion band. Members Nasri, Ben Spivak, Mark Pellizzer, and Alex Tanas stopped by On Air with Ryan Seacrest to perform their hit song "Rude."