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.

Bilbo helps the dwarves escape from an elven dungeon by hiding in wine barrels. After floating down an underground stream, they wash up in a town built on a lake, where a small colony of humans are living a perilous existence near the dragon Smaug. There, Thorin, leader of the dwarves, and grandson of King of the Mountain, declares his return!

Eagles swoop from the skies to pluck Gandalf, Bilbo, and the dwarves from peril. But what are the eagles’ intentions? Do they mean to dash the group against the rocks? Or could this really be a goodwill rescue, and a favor returned after many years?

Gollum eyes Bilbo as a juicy meal, but little does he know that the hobbit has found the one thing he prizes the most, his precious golden ring! Losing a battle of wits and then the ring, Gollum flies into a rage, and Bilbo discovers just in time that the ring has magic powers.

Bilbo and the dwarves come to Rivendell, where they are enchanted by elven music and hospitality, and discover magic runes that guide them on their quest. But, back on the road, a violent storm halts their progress, and as they shelter in a dark cave, goblins attack!”

The dwarves stumble across a group of trolls feasting on mutton. Instead of avoiding them, they send forward Bilbo, their “expert burglar," to steal the meat from under the trolls’ noses.

The dwarves tell of the terrifying dragon, Smaug, his destruction of the human town of Dale, and how he drove them from their mountain, stealing their hoards of gold. Bilbo also learns the perilous nature of the adventure that awaits him.

The dwarves have long held great wealth, hidden in golden hordes. In verses of song, they tell their history of generations at work beneath the mountain who formed their gold, silver, and jewels into fine treasures and works of art.

John Searle's thought experiment, called "The Chinese Room," presents an argument against the idea that computers could ever be truly intelligent.

The Tom and Jerry cartoon has been a classic since it first came out in 1940. America's favorite rivals now take their cat-and-mouse game to the big screen – coming to theaters in 2021.

The more you think about it, the more complex time travel seems! This video explains a key paradox that is one of the main reasons for this.

The English language has changed in many ways over the centuries, but the internet has changed it in just a few decades. Why use a whole sentence when an abbreviation will do?

Fred Flintstone and his best friend Barney Rubble like to go bowling and play golf, but before they can relax and enjoy themselves, there are household chores to be done. Fortunately for them and their wives, Wilma and Betty, there have already been some fantastic new inventions to make Stone Age living that much easier.

Bedrock, home of the famous cartoon caveman Fred Flintstone, is a very modern Stone Age city. There are newspapers, cars, televisions and telephones, even a system of airmail!

How can one brother travel into space and return younger than his twin? In just sixty seconds, a startling side effect of Einstein’s Theory of Relativity is explained to us.

Dolphins are one of the smartest animal species on Earth. In fact, their encephalization quotient (their brain size compared to the average for their body size) is second only to humans. But exactly how smart are they? This video shares some incredible facts about dolphins.

This ancient mathematical trickery posits that a mighty hero cannot overtake a tortoise. Zeno of Elea (born c. 490 BCE) is the author of this and other paradoxes.