What would happen to you if a black hole the size of a coin suddenly appeared in your pocket? Let's find out!

Schrodinger’s hypothetical experiment involved putting an unfortunate cat into a box with a Geiger counter and a vial of deadly poison. Until the box was opened, the cat could be said to be alive, or dead… or possibly in both of these states simultaneously.

If a hotel with an infinite number of rooms has an infinite number of guests, how could it free up space when new guests arrive? Hilbert's “Grand Hotel” paradox has fascinated mathematicians, physicists, philosophers, and theologians, as it encourages another way of thinking about the notion of infinity.

On the most fundamental level thinkable, what are things? Why are things? And why do things behave the way they do? Here is an introduction to particle physics, with all of the vocabulary you'll need.

All of the ridicule turns to love and acclaim as Rudolph’s unique nose becomes a beacon in the darkness, lighting Santa’s way on that dark and foggy Christmas Eve.

This classic American cartoon from the 1940s tells the story of the most famous reindeer of all, Rudolph the Red-Nosed Reindeer. Shunned by his peers for his unusual appearance, he’s called on by Santa for a special job on Christmas Eve!

The group makes a plan to spread word of the Inuit's plight, but there's already a tense situation building, as hungry polar bears enter the village in search of food.

Debbie takes the young reporters along on a hunting trip and shows them one of the last remaining areas for wildlife. We hear more about the strain that a changing climate is placing on these remote and traditional communities.

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.

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.

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).

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.

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.

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!

Written and sung by Lynn Ahrens for Schoolhouse Rock, this song teaches about the pilgrims, from their arrival in America up to the Boston Tea Party.

Maestro takes the kids across the world to show them what is being done to deal with the worst issues related to waste and pollution.

Traveling aboard the flying globe that Maestro himself has invented, the young environmentalists set out to see the situation in other parts of the world up close.

Maestro shows what can happen at conferences on the environment, where the blame is passed from person to person and little is resolved. But he also sees the necessity of paying attention to such issues, and encourages the kids to continue with their own plans to promote change.

Maestro listens as the kids tell him about all the things they see going wrong in the world, their fears, and their frustration that so little is being done. He wants to know if they have any solutions.

The group is concerned about global and environmental issues. They want to take action, but must find a base to work from. Meanwhile, off the coast of Brittany, a new environmental disaster is occurring...

This animated video shows how tuberculosis, still a very common disease, spreads and is fought by our bodies. Find out more about MSF’s work treating tuberculosis around the world.

The trolley problem is a classic thought experiment in moral philosophy. Is sacrificing one life to save the lives of many others the best possible outcome?

This Schoolhouse Rock video is about interjections, which are used to express emotions. Fun fact: the singer of this song, Essra, also sang on Sesame Street and wrote a number of pop hits by artists such as Cyndi Lauper and Tina Turner.

Plato is considered one of Philosophy’s greatest writers. He was able to conceive of greater realities by imagining how much poorer our perception would be if we had lived our whole life as prisoners locked in a cave.