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.

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.

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.

The philosopher Friedrich Nietzsche questioned the ability of science to explain and give meaning to our world, daring us to think critically not only about religion, but science, and knowledge itself. Learn all about his ideas in this fun video inspired by vintage video games.

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?

Abi tells us a little about the history of the origami paper crane, from its significance in Japanese culture to her own personal contact with this powerful modern symbol of hope and goodwill.

January 20th of 2009 was an important day in American history. The words “change” and “hope” were heard that afternoon in Washington, D.C., as Barack Obama became the 44th President of the United States. Don’t miss a word of his speech!

We take you to the front row of this historical speech. Let’s listen to Barack Obama’s words of wisdom as he becomes the 44th President of the United States of America.

In this historical speech, Barack Obama speaks of the greatness of the multiculturalism of the United States of America, and how it is a tool that will help us overcome all difficulties.

Blackbeard’s story almost seems mythological, but it's actually based in truth. This video elaborates on the man Edward Thatch, starting with his origins on the island of Nassau to his reign of terror in the Caribbean.

Continuing to pirate audaciously, Blackbeard sails up the eastern coast of the United States, where, incredibly, he secures a pardon from the Governor of North Carolina. Setting up base on an island, he is soon plundering ships again, but by now has made some determined enemies and faces capture, dead or alive.

The city of Oxford is home to some 150,000 residents and a famous seat of learning, the oldest English-speaking university in the world. Although the exact date of its founding isn't known, it is said that local priests and monks were first taught in monastery schools in the area in the eleventh century.

Even if you're not the biggest fan of school, you've got to admit it's better than the historical schools depicted in this series! They certainly had some questionable moral codes and weird punishments...

Not long ago, in Welsh schools, the pupils weren’t allowed to speak their native language, Welsh! There was no choice but to learn English. In the Victorian classroom, learning is dull and repetitive, but today’s lesson is not going exactly as the teacher has planned.

After Victoria became Queen, English children’s names became really weird. A girl called Never… a boy called Toilet… For one poor teacher, taking the class register is almost impossible!