In which John introduces you to quite a lot of Chinese history by discussing the complicated relationship between the Confucian scholars who wrote Chinese history and the emperors (and empress) who made it. Included is a brief...

The term "OCD" often gets thrown around lightly by people describing their affinity for neatness, but actual obsessive-compulsive disorder is a serious condition that goes well beyond just cleaning and counting.

Mr. Andersen describes the virtual fly lab. Software at sciencecourseware.org allows for multiple matings and statistical analysis.

The Apollo 11 moon landing was about the astronauts, mission control, software and hardware all working together as a seamless integrated system. None of which would have been possible without the contributions of one engineer: Margaret...

The cross product is a way to multiple to vectors in 3d. This video shows how to visualize what it means.

When there’s only one species on an evolutionary branch, we call it a monospecific taxon. Studying these special species can help us better understand not just those sparse groups, but all life on this planet.

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So we've talked a lot about what makes games so great in this series, but we haven't really addressed the big question: why do we play games anyway? And well, the answer is pretty complicated, especially when you consider that some...

The cross product is a way to multiple to vectors in 3d. This video shows how to visualize what it means.

Scientists are working on creating organisms with designer genomes -- and someday, we might end up with bacteria manufacturing our jet fuel.

Scientists have known for some time that certain animals can breathe using their butts, but now, researchers have determined that certain mammals can too! And in very much other news, researchers in Washington state have developed a new...

We've talked about variables and solving problems. But how do we keep working on a problem if the first solution doesn't fix it? Trials! In this episode of Crash Course Kids, Sabrina shows us how to use Trials to figure out what the...

How does math keep a folded slice from drooping? And what does pizza have to do with the speed of light?

Iran and Israel: two nations with tense relations that seem existentially at odds. But for all their antagonistic rhetoric, there is a recent hidden history of collaboration, even friendship. In an informative talk, Trita Parsi shows how...

He was a powerful king whose break with the church of Rome would forever change the course of English history. But was he a charismatic reformer who freed his subjects from a corrupt establishment or a bullying tyrant who used...

Supply chain challenges are real, but they're not new, says global trade expert Dustin Burke. In the face of disruptions ranging from natural disasters to pandemics, how do we make sure supply chains can keep up? Burke offers a...

Today we’re going to discuss how 3D graphics are created and then rendered for a 2D screen. From polygon count and meshes, to lighting and texturing, there are a lot of considerations in building the 3D objects we see in our movies and...

The professional astronomer or astrophysicist is a pretty recent phenomenon. In the past, astronomy was often performed by nobility and extremely enthusiastic amateurs. Although it seems like the scientific exploration of our universe is...

In this video Paul Andersen shows conceptual thinking in a mini-lesson on causal patterns at varying scale.


TERMS
Patterns - regularity in
the world
Scale - the relative size or exte
nt of something
System - a set...

During the period of rapid industrialization at the turn of the 20th century, factory jobs were incredibly unsafe. That is, until Dr. Alice Hamilton basically became an investigative reporter to figure out how factories were poisoning...

Centuries of inequality can't be solved with access to technology alone -- we need to connect people with training and support too, says tech inclusionist 'Gbenga Sesan. Sharing the work behind the Paradigm Initiative, a social...

Our mood is influenced in many ways by our environment, and researchers have discovered a possible connection between the pollen in our air and a rise in suicide.

In 4 minutes, atmospheric chemist Rachel Pike provides a glimpse of the massive scientific effort behind the bold headlines on climate change, with her team -- one of thousands who contributed -- taking a risky flight over the rainforest...

Hank explains the enormity of the Giant Magellan Telescope, possibly the biggest telescope ever built, as well as updates about NASA's new mission to the moon, and an unusual discovery about the habits of deep-sea squid.

In today’s episode, Hank asks you to consider all the ways people talk about justice and what we really mean when we use that word. We’ll explain various theories of justice, just distribution, and different approaches to punishment.