A montage of the tumultuous and often hilarious romantic entanglements in the hit American series Two and a Half Men.

Alan gets very nervous when Charlie shows an interest in the receptionist at his practice.

Alan and his son Jake discuss the merits of going to college in this extended preview of an episode of the popular sitcom Two and a Half Men.

The recap of a hilarious season of Two and a Half Men, in which tech billionaire Walden moves in with the guys, and has heaps of trouble deciding between his new girlfriend Zoey and ex-wife Bridget.

U2 are the biggest Irish rock band ever and this one of their greatest hits. It's a song of earnest doubt and heartfelt yearning that reminds us that we are all human and all searching for some meaning in our lives.

English reggae and pop band UB40 were at the peak of their fame in the nineteen eighties, and they continue to make music and tour. They collaborated with new reggae band KIOKO for this single, which was featured on their album Bigga Baggariddim.

UNICEF Goodwill Ambassador Katy Perry delivers a special weather report on the devastating effects of climate change for the world’s children.

There is a lot of talk about how 3D printing could revolutionize the way that we make stuff. But what is 3D printing and how does 3D printing allow us to make almost anything from nothing? Professor Tim Minshall, Head of the Institute for Manufacturing at the University of Cambridge, explains it in this video, which is targeted at school-age students.

The University of Cambridge is one of England's greatest universities. There's no main campus – instead, the university's many colleges are scattered throughout the charming town center. Many colleges welcome the public to browse around.

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

Watch this video for "Dance The Night Away," the first top 20 hit of the American rock group Van Halen.

At the University of Sydney, physicist Derek Muller explores the possibility of an anti-gravity wheel through a series of field tests.

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

We meet a young woman, Caralie, on the street. She takes us to her apartment building. She checks her mail-box. She invites us inside and up the stairs to her third-floor apartment.

Caralie takes us into her kitchen. Here she talks about fruits, vegetables and preparing soup. She also shows us some important appliances in her kitchen.