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.