This week on Crash Course Mythology, we're getting urban. Mike Rugnetta is the man with the orange umbrella who's about to give you a free tour of mythical cities. We'll talk about a few cities that didn't exist, but we're going to focus...

Colleges and universities in the US make billions of dollars each year from sports, compromising the health and education of athletes -- who are disproportionately Black -- in the name of money, power and pride. Sports lawyer and...

The year was 1776. In Bavaria, new ideals of rationalism, religious freedom and universal human rights competed with the Catholic church's heavy influence over public affairs. Adam Weishaupt, a law professor frustrated with the Church's...

Why is health care so expensive? Once again, there are a lot of factors in play. Jacob and Adriene look at the many reasons that health care in the US is so expensive, and what exactly we get for all that money. Spoiler alert: countries...

BPA has had some bad press, and now we're all wondering: Is BPA bad for us? Michael Aranda goes into how we encounter BPA in our lives and how it affects us.

What do astronomers look for when they study exoplanets for signs of alien life? Hank explains how space telescopes are already yielding tantalizing clues of what other worlds might hold -- including water! -- and how the next generation...

Business is screwed if we don't fix climate change, says economist Rebecca Henderson. In this bold talk, she describes how unchecked capitalism destabilizes the environment and harms human health -- and makes the case for companies to...

Today, we wrap up our discussion of the console wars by taking a look at Microsoft's Xbox which was announced in 2001. The early 2000s saw a lot of innovation in hardware and games and we'll cover some of that, but one significant change...

This week, we're continuing our discussion of Mark Twain's 'The Adventures of Huckleberry Finn.' This is part two of our talk about Huck Finn, and this time we're looking at the metaphors in the book, a little bit about what the...

It may seem like there isn’t a lot going on in a baby’s brain. But as we continue to study them and our relationship with them, we begin to understand more about the complexities behind those big eyes, and this compilation takes a look...

Breast milk grows babies' bodies, fuels neurodevelopment, provides essential immunofactors and safeguards against famine and disease -- why, then, does science know more about tomatoes than mother's milk? Katie Hinde shares insights into...

Chris Anderson, then the editor of Wired, explores the four key stages of any viable technology: setting the right price, gaining market share, displacing an established technology and, finally, becoming ubiquitous.

Cities are becoming increasingly privatized: commercial real estate dominates the streets, carving up open space that once belonged to the public and selling it as a commodity to the highest bidder. Architect Elizabeth Diller explores...

Today we’ll continue to explore sociology’s founding theorists with a look at Karl Marx and his idea of historical materialism. We’ll discuss modes of production, their development, and how they fit into Marx’s overall theory of...

The clash of ideas is fundamental to creativity and progress, but it can also be deeply destructive and create divisions within companies, communities and families. How do you foster productive debate while protecting against harmful...

Jacqueline Novogratz shares stories of how "patient capital" can bring sustainable jobs, goods, services -- and dignity -- to the world's poorest.

The Internet has transformed the front lines of war, and it's leaving governments behind. As security analyst Rodrigo Bijou shows, modern conflict is being waged online between non-state groups, activists and private corporations, and...

In which John Green teaches you about Reconstruction. After the divisive, destructive Civil War, Abraham Lincoln had a plan to reconcile the country and make it whole again. Then he got shot, Andrew Johnson took over, and the...

Hank faces off against his Crash Course co-worker Evelyn from the Internets in this test of wits and sticky science knowledge! Who will win and who will lose?

Human beings have been campaigning against inequality and poverty for 3,000 years. But this journey is accelerating. Bono "embraces his inner nerd" and shares inspiring data that shows the end of poverty is in sight … if we can harness...

Asgard, a realm of wonders, was where the Norse Gods made their home. There Odin's great hall of Valhalla towered above the mountains and Bifrost, the rainbow bridge, anchored itself. Though their domain was magnificent, it stood...

The land of the free has become a legal minefield, says Philip K. Howard -- especially for teachers and doctors, whose work has been paralyzed by fear of suits. What's the answer? A lawyer himself, Howard has four propositions for...

Hank introduces us to that great mathematical mind, Alan Turing, who, as an openly gay man in the early 20th century faced brutal prejudice that eventually led to his suicide, despite being a genius war hero who helped the Allies defeat...

After weeks of exploring the existence of nature of god, today Hank explores one of the biggest problems in theism, and possibly the biggest philosophical question humanity faces: why is there evil?