In this scene from the classic British sitcom Only Fools and Horses, Del Boy and Rodney are left stranded when their van breaks down on the way to a party, and they really don’t want to be seen in their costumes!

Anne-Marie has fun teaching pop star Olly Murs a kick and a block to defend from that kick. Then he tries his hand with the nunchucks, but proves to be more of a danger to himself than to anyone else! Overall, he’s very good, and almost gets top marks for his first day of karate.

The boys from the pop band The Vamps join Anne-Marie for a karate lesson. She takes them though a warm up, some kicking and punching, then a game and a sparring session that threatens to get out of control!

Mayim shares her doubts and misgivings about open relationships. It seems that for her, the commitment, predictability, and closeness of a monogamous relationship is all together more meaningful and enjoyable.

Actress, author, and neuroscientist Mayim Bialik considers open relationships. While she sees the benefits, there are certainly things she doesn’t “get” about this kind of arrangement, as she sees male and female biology clearly dictating different ideals.

Jimmy Carter asks Adam Sandler about some biting criticism he had received in regard to his Saturday Night Live appearances. They also talk about the old days, Sandler's various characters, and his movie The Wedding Singer.

In this segment, we learn about the role weather plays in the creation of rock formations in the national parks of the United States.

Fuse School: Learn the basics about the effects of global warming on the environment. Some of the problems global warming may cause are changing climate, extremes of weather, problems for ecosystems, rising sea levels, and ocean acidification.

Kaley Cuoco talks about the terrifying trip to New Zealand with her boyfriend's family that ended in her swinging through a canyon.

A look at how lexicographers started creating the Dictionary of the English Language to ensure that everyone spelled words correctly and knew their correct definition.

Michelle Obama continues discovering how shopping works for normal people. Meanwhile, Ellen purposely annoys her every step of the way

In the 17th Century, scientific research influenced the invention of English words relating to physics, chemistry, and anatomy.

Have you ever been unsure as to how elections work in the US on a federal and state level? This video explains it all.

Created in 1611, The King James Bible permanently shaped the English language with new phrases that are still in use today. How many of them do you know?

Greentraveller's Richard Hammond shows you some of the loveliest and greenest spots in London, and gives some tips for navigating through the city.