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.

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.

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

We’ve all seen footage of the first men walking on the moon... but how exactly did they get there? This video details the fascinating, many-faceted construction of the Apollo 11 spacecraft so that we can see exactly what happened in what order to make this incredible journey a reality.

Many secrets remain surrounding the creation of Stonehenge. Archaeologists try to unravel the mystery.

Ellis Island, the U.S. gateway to immigration from distant lands, has been reopened to visitors, following significant damage from Hurricane Sandy. A visit there, and to the nearby Statue of Liberty, can be emotional, even for those born in the U.S.

Join Karine as she goes behind the scenes at the University of Oxford, one of the world’s oldest and most prestigious educational institutions and alma mater to kings and presidents.

In this video, you can learn all about Oxford, England, a beautiful university town steeped in history. There are many places of interest spread among the many colleges that comprise the university.

Nursery rhymes are for children. The rhyme about Humpty Dumpty, however, is so famous that it's been used in literary and cinematic contexts as well.