Crash Course
DC Resistors & Batteries: Crash Course Physics
Batteries power much of your daily life, so today we're going to talk about how they work. We're also explaining how terminal voltage results from the natural internal resistance of every real battery. We'll get into both series and...
Crash Course
Exoplanets: Crash Course Astronomy
Today Phil explains that YES, there are other planets out there and astonomers have a lot of methods for detecting them. Nearly 2000 have been found so far. The most successful method is using transits, where a planet physically passes...
Crash Course
Introduction to the Solar System: Crash Course Astronomy
In today's Crash Course Astronomy, Phil takes a look at the explosive history of our cosmic backyard. We explore how we went from a giant ball of gas to the system of planets and other celestial objects we have today. This episode is...
Crash Course
Stars: Crash Course Astronomy
Today Phil’s explaining the stars and how they can be categorized using their spectra. Together with their distance, this provides a wealth of information about them including their luminosity, size, and temperature. The HR diagram plots...
Crash Course
The Periodic Table: Crash Course Chemistry
Hank gives us a tour of the most important table ever, including the life story of the obsessive man who championed it, Dmitri Mendeleev. The periodic table of elements is a concise, information-dense catalog of all of the different...
Crash Course
World War II: Crash Course World History
Crash Course World History is now available on DVD! Visit http://store.dftba.com/products/crashcourse-world-history-the-complete-series-dvd-set to buy a set for your home or classroom. In which John Green teaches you about World War II,...
Crash Course
The Clinton Years, or the 1990s Crash Course US History
In which John Green teaches you about the United States as it was in the 1990s. You'll remember from last week that the old-school Republican George H.W. Bush had lost the 1992 presidential election to a young upstart Democrat from...
Crash Course
Interest Group Formation: Crash Course Government and Politics
So last week we talked about what special interest groups are and how they influence the political system, and today we’re going to focus on why we even have them in the first place. As to avoid getting too cynical, we’re going to focus...
Crash Course
Click Restraint: Crash Course Navigating Digital Information #9
The architecture of the social internet itself tells us not to be patient - to load more tweets, to hit refresh for new posts, and to click the top search results. But just because information is new, or algorithmically determined to be...
Crash Course
What Holds a Country Together or Tears it Apart? Crash Course Geography
Today we’re going to talk about the forces that affect a country’s stability. We’ll take a closer look at Costa Rica, Venezuela, Cuba, and Brazil and examine how the cohesiveness of these Latin American countries varies dramatically even...
Crash Course
Aesthetics: Crash Course Philosophy
How do art and morality intersect? Today we look at an ethically questionable work of art and discuss R. G. Collingwood’s view that art is best when it helps us live better lives. We’ll go over Aristotle’s concept of catharsis and how it...
Crash Course
Computer Vision: Crash Course Computer Science
Today we’re going to talk about how computers see. We’ve long known that our digital cameras and smartphones can take incredibly detailed images, but taking pictures is not quite the same thing. For the past half-century, computer...
Crash Course
The Director: Crash Course Film Production
So... what do Directors even do? That's not an easy question to answer but today Lily will do her best. Generally, directors are the driving creative force behind a movie, deciding what kind of cinematic world the story will take place...
Crash Course
George HW Bush and the End of the Cold War Crash Course US History
In which John Green teaches you about the end of the Cold War and the presidency of George H.W. Bush. It was neither the best of times, nor the worst of times. On the domestic front, the first president Bush inherited the relative...
Crash Course
What is a “Developed” Country? Crash Course Geography
Today we’re going to discuss what it means for a place to be “developed”. Development is often associated with economic success — that is countries with higher standards of living and material wealth like those found in Europe and North...
Crash Course
The New Astronomy: Crash Course History of Science
This week on Crash Course: History of the Scientific Revolution—astronomical anomalies accrued. Meanwhile, in Denmark—an eccentric rich dude constructed not one but two science castles! And his humble German assistant synthesized a lot...
Crash Course
The American Revolution Crash Course Black American History
When we talk about the American Revolution and Revolutionary War, the discussion often involves lofty ideals like liberty, and freedom, and justice. The Declaration of Independence even opens with the idea that "all men are created...
Crash Course
Blood Vessels, part 1 - Form and Function: Crash Course A&P
Now that we've discussed blood, we're beginning our look at how it gets around your body. Today Hank explains your blood vessels and their basic three-layer structure of your blood vessels. We're also going over how those structures...
Crash Course
Motion in a Straight Line Crash Course Physics 1
In this, THE FIRST EPISODE of Crash Course Physics, your host Dr. Shini Somara introduces us to the ideas of motion in a straight line. She talks about displacement, acceleration, time, velocity, and the definition of acceleration. Also,...
Crash Course
Public Opinion: Crash Course Government and Politics
So today, Craig is finally going to start talking about politics. Now up until this point we've specifically been looking at government - that is answering the questions of who, what, and how in relation to policies. But politics is...
Crash Course
Presidential Powers 2: Crash Course Government and Politics
This week Craig continues our conversation on presidential powers by looking at those NOT found in the Constitution - implied or inherent powers. We’ll talk about how the president uses his or her power to negotiate executive agreements,...
Crash Course
Evaluating Photos & Videos: Crash Course Navigating Digital Information #7
With the amount of fake and doctored photos and videos out there, how can we know what to trust? Most of us are used to thinking that "seeing is believing" but as technology makes it easier and easier to spread unreliable content online...
Crash Course
The Electron: Crash Course Chemistry
Hank brings us the story of the electron and describes how reality is a kind of music, discussing electron shells and orbitals, electron configurations, ionization and electron affinities, and how all these things can be understood via...
Crash Course
The Red Summer of 1919: Crash Course Black American History
During the Red Summer of 1919 violence against Black people broke out across the United States. Black people and neighborhoods were attacked in Washington DC, Chicago, Tulsa, and many other cities and towns across the country. Post-war...