In this song, Rihanna captures the tension of a broken relationship. The woman is cheating on her man, though she knows exactly how much it hurts him.

In this video lesson, Luana has advice for avoiding arguments and fights, how to resolve them calmly and peacefully, and if necessary, express our apologies.

In the middle of Manhattan, there is an ancient Egyptian monument with carved hieroglyphics. John informs us of its vital statistics and lasting significance.

The kids are frustrated with how slow things seem to be progressing, but Maestro boosts their enthusiasm with some good news: Their search for a workspace is over, and a new environmental movement is born — The Guardians of the Planet!

It’s very warm for November, and the kids are playing outside. They’re convinced that the greenhouse effect is responsible for the unusual weather, and think it could make a good subject for the next issue of their newspaper.

In “Californication," from their album of the same name, American band the Red Hot Chili Peppers explore a darker, almost dystopian side to the Californian lifestyle.

Maestro speaks about the Earth’s atmosphere, and explains how the greenhouse effect is changing the planet’s ability to regulate its own temperature. The kids want to know what is being done about the problem, and what the outcome might be.

This song teaches about the universal law of gravity and is performed by the Tokens in the style of 1950s doo-wop (an era made popular at the time by films such as Grease and TV series such as Happy Days).

One of the most famous songs from American boy band the Backstreet Boys, the true meaning of "I want it that way" is debated. However, the lyrics suggest a desire to find the security of mutual love and trust in a loving relationship.

The Gulf Stream plays a big part in maintaining the temperatures we are used to, and Maestro explains that if it is interrupted, parts of the world could become colder as an unexpected result of global warming.

"Nights in White Satin" is a 1967 single by The Moody Blues, written by Justin Hayward and first featured on the album Days of Future Passed. Enjoy!

ALF stands for Alien Life Form, and was the name of this nineteen eighties American sitcom and its main character. In this episode, ALF has promised to behave well for a week, taking to extremes a new role as a posh servant and chef. Now his host family is wishing for a return to normality.

When a message arrives from an Inuit correspondent, a small team sets off to investigate the environmental changes that threaten the delicate balance of life in the frozen north.

Whenever faced with a conflict of interest between their profits and our safety and security, Facebook shows scant regard for honesty and ethics. So says former high-level Facebook employee Frances Haugen, who hit the headlines with this exposé of the social media giant.

In this clip, Mark Powell provides best practice tips for opening and closing presentations. The key is often beginning with a story or anecdote that engages the audience.