The Harlem Renaissance was one of the richest, most vibrant, and most culturally generative artistic periods in American history and the work that emerged from that period continues to shape the landscape of American arts and letters...

Today, we're going to combine the artificial neuron we created last week into an artificial neural network. Artificial neural networks are better than other methods for more complicated tasks like image recognition, and the key to their...

Next stop on our tour of engineering’s major fields: electrical engineering. In this episode we’ll explore the history of telecommunications, electric power and lighting, and computers. We’ll introduce topics like magnetism, electrical...

Today we’re going to talk about urban planning — which is the design and regulation of space within urban areas. Urban planning helps weave together economic, social, and environmental goals within a region from work, to play, and...

From towering skyscrapers covered in trees to zero carbon smart cities, there are so many ways to imagine what a sustainable city of the future might look like. But what does it really mean to be sustainable anyway? Today, we’re going to...

Nachos are delicious. And versatile because today they're also going to help us learn a thing or two about your digestive system. Nachos can provide us with energy and raw materials, by first ingesting something nutritious, propelling it...

Phil starts the planet-by-planet tour of the solar system right here at home, Earth.

This week we are wrapping up our overview of sociology’s core frameworks and founding theorists with a look Max Weber and his understanding of the modern world. We’ll explore rationalization and the transition from traditional to modern...

In which John Green teaches you about the war that was supposed to end all wars. Instead, it solved nothing and set the stage for the world to be back at war just a couple of decades later. As an added bonus, World War I changed the way...

Hello, world! Welcome to Crash Course Computer Science! So today, we’re going to take a look at computing’s origins, because even though our digital computers are relatively new, the need for computation is not. Since the start of...

Before moving on from Jupiter to Saturn, we’re going to linger for a moment on Jupiter’s moons. There are 67 known moons, and 4 huge ones that we want to explore in greater detail. Ganymede is the largest - larger, in fact, than any...

Oxygen is pretty dang amazing! Some of the most intensely studied functional groups in organic chemistry have oxygen atoms. In this episode of Crash Course Organic Chemistry, we're building on the last episode's discussion of...

This week we are exploring biodevices and the part they play in the healthcare world. We’ll look at the challenges of implantable biodevices, like biocompatibility, power and connectivity, packaging, structural design, delivery systems,...

Would you like to play a game, Dr. Falken? Actually, this episode isn't really about games, or Matthew Broderick, or Thermonuclear War. But enough with the long references to 1983's best movie, War Games. Today Jacob and Adriene are...

As we promised last week, we're not quite done talking about your pee yet. Today Hank explains how the urinary system regulates the production of urine, by maintaining a study glomerular flow rate. He'll also cover the anatomy of storing...

Our month-long exploration of human reproduction continues with a look at testicular anatomy, the steps of sperm production, and how it's influenced by gonadotropin and testosterone. Hank also explains how sperm mature, and how they...

In our final episode of Crash Course Psychology, Hank discusses the ideas of Aggression and Altruism. These two things are difficult to understand and explain so sit tight and get ready to run the gauntlet of human emotions. If you are...

Music plays a big part in many of our lives. Whether you just like to listen or you enjoy playing an instrument, music is powerful. So what is music? How does it work? What are the physics of music? In this episode of Crash Course...

Why is it hard to move a heavy bookcase across a carpeted floor? And why is it easier to keep it moving than it was to get it started moving? You might think it's all about weight, but actually it's about friction. Two kinds of friction!...

A sad reality that we have to face when studying outbreak science is that sometimes groups of people use outbreaks intentionally to inflict harm on another group. We call this "weaponizing an outbreak", and it's the focus of this episode...

It's time to talk about one of the most awesome scientists that has ever been awesome: Marie Curie. She figured out ways to get an amazing education despite the limitations of her homeland, discovered some really important answers to the...

We're still leading up to World War II, but first we gotta talk about the rise of the dictators. Today we talk about the rise of militaristic dictatorships in Germany, the Soviet Union, Japan, and Spain, and the economic depression that...

Today we are taking all the things we have learned this year about doing philosophy and applying that to moral considerations regarding non-human animals. We’ll explore what philosophers like Peter Singer and Carl Cohen have to say about...

We're off to fact-checking school. This time, John Green is teaching you how to fact-check like the pros. We're going to walk through the steps that professionals follow, including figuring out who is behind the information we read, why...