Is the Universe Entirely Mathematical feat. Max Tegmark

Using wikis and digital fabrication tools, TED Fellow Marcin Jakubowski is open-sourcing the blueprints for 50 farm machines, allowing anyone to build their own tractor or harvester from scratch. And that's only the first step in a...

Sometimes, diagnosing patients is pretty easy, but other times... not so much. Luckily, in a medical setting we have tools that can help us figure out what's wrong with patients, and how to help them. In this episode of Crash Course...

Can art save lives? Not exactly, but our most prized professionals (doctors, nurses, police officers) can learn real world skills through art analysis. Studying art like Rene Magritte's Time Transfixed can enhance communication and...

This week Craig Benzine talks about what happens when a case makes it to the Supreme Court of the United States (or the SCOTUS). We're going to focus on court procedure today. We talk about how to petition to get your case heard, how...

Here's a paradox: as companies try to streamline their businesses by using artificial intelligence to make critical decisions, they may inadvertently make themselves less efficient. Business technologist Sylvain Duranton advocates for a...

In which Mike Rugnetta teaches you about Ma'ui, prominent hero of many cultures in Oceania, aka the Pacific Island nations. Ma'ui is just the kind of hero we're interested in here at Crash Course. He's a culture hero, he's a an...

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...

Have you ever lost a tooth? Or maybe you have teeth that are getting a little wiggly? It's all part of growing up! Join Jessi and Squeaks to learn why we lose our baby teeth and how we can take care of our new permanent teeth! Say cheese!

The story of the word X-Ray is one of great thinkers. French philosopher Rene Descartes isolated the letters X, Y and Z to stand for unknowns, and centuries later, Wilhelm Rontgen discovered the X-ray, using the X for the unknown nature...

In the US, the very same blood test can cost $19 at one clinic and $522 at another clinic just blocks away -- and nobody knows the difference until they get a bill weeks later. Journalist Jeanne Pinder says it doesn't have to be this...

You might have heard about the debut of Hologram Tupac at the music festival Coachella earlier this year. But with Queen's recent announcement of a Hologram Freddie Mercury and TLC's plans for a Hologram Lisa Left Eye Lopes, it looks...

In this video Paul Andersen explains how a system can be viewed as an object and an object can be viewed as a system.

This week we’re exploring aerospace engineering and its two main fields: aeronautical engineering and astronautical engineering. We’ll explore life & buoyancy, propulsion systems, and the challenges of managing the human body in space.

In this video Paul Andersen explains how inertial mass is defined and measured. When a force is applied to an object or a system it will accelerate. Using Newton's Second Law of Motion (F=ma) you can calculate the inertial mass.

What if we could better understand the world's biggest challenges simply by looking at a map? Jack Dangermond, a pioneer in geographic information system (GIS) technology that powers the digital maps people around the world use every...

Explore the origins of one of the coolest geologic formations in the world, West Africa's Richat Structure.

So... what makes the wind? You might be surprised to learn that it has to do with two of Earth's spheres; The Hydrosphere and the Geosphere. In this episode of Crash Course Kids, Sabrina takes us to the beach to chat about how the wind...

TED Fellow and urban designer Mitchell Joachim presents his vision for sustainable, organic architecture: eco-friendly abodes grown from plants and -- wait for it -- meat.

In which you are introduced to the life and accomplishments of Alexander the Great, his empire, his horse Bucephalus, the empires that came after him, and the idea of Greatness. Is greatness a question of accomplishment, of impact, or...

In this video Paul Andersen explains how object interactions can add or remove mass or energy from a system.

The Sound! The Fury! Today, we're talking about Shakespeare's Scottish play, Macbeth. So, was Macbeth really predestined to do all the murdering and bad kinging and other terrible stuff? That's the big question in Macbeth, and it's one...

Animal behavior isn't complicated, but it is complex. Nicolas Perony studies how individual animals -- be they Scottish Terriers, bats or meerkats -- follow simple rules that, collectively, create larger patterns of behavior. And how...

Work-life balance, says Nigel Marsh, is too important to be left in the hands of your employer. Marsh lays out an ideal day balanced between family time, personal time and productivity -- and offers some stirring encouragement to make it...