An introduction to an interactive experience on why quaternions describe 3d rotations

Having a kid does some weird things to the brain, and that can lead to or aggravate all kinds of psychiatric conditions.

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...

Media and advertising companies still use the same old demographics to understand audiences, but they're becoming increasingly harder to track online, says media researcher Johanna Blakley. As social media outgrows traditional media, and...

The aftermath of the collapse of the Soviet Union and its Warsaw Pact had a huge impact on the countries of Eastern Europe. As the former satellite states turned away from communism and Soviet influence, some of them shifted toward...

What is the dot product? What does it represent? Why does it have the formula that it does? All this is explained visually.

Today, Clint will teach you about the Supreme Court confirmation hearing of Clarence Thomas. During the screening process, Anita Hill came forward alleging that Thomas had sexually harassed her when the two of them worked together at the...

The heat equation, as an introductory PDE.

What is the dot product? What does it represent? Why does it have the formula that it does? All this is explained visually.

European researchers claim to have developed a composite material that is basically uncuttable, so with this material, your bike might never be stolen.

The secret to winning an argument isn't grand rhetoric or elegant style, says US Supreme Court litigator Neal Katyal -- it takes more than that. With stories of some of the most impactful cases he's argued before the Court, Katyal shows...

You may have heard about a study where researchers were able to grow lumps of neural tissue that showed measurable activity – a little bit like an actual brain. Are scientists trying to grow artificial brains, and if so, what kind of...

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...

Mosquitoes transmit a number of terrible diseases like malaria, West Nile virus, and the Zika virus, but why not the flu?

Quantum Field Theory is generally accepted as an accurate description of the subatomic universe. However until recently this theory had one giant hole in it. The particles it describes had no mass!

Community organizer Raj Jayadev wants to transform the US court system through "participatory defense" -- a growing movement that empowers families and community members to impact their loved ones' court cases. He shares the remarkable...

Ziyah Gafić photographs everyday objects—watches, shoes, glasses. But these images are deceptively simple; the items in them have been exhumed from the mass graves of the Bosnian War. Gafić, a TED Fellow and Sarajevo native, is...

This week, we're going to Italy for a Renaissance. The Middle Ages are over, and it's time to talk about the flourishing of art and humanism across Europe. Painting, sculpture, music, architecture, and plays with fart jokes were all...

Eigenvalues and eigenvectors are one of the most important ideas in linear algebra, but what on earth are they?

Townspeople are demanding that a corrupt merchant's collection of 30 rubies be confiscated to reimburse the victims of his schemes. The king announces that the fine will be determined through a game of wits between the merchant and the...

About 10% of the world population is left-handed. But why does handedness exist and what determines which hand is dominant? Scientists have suggested several theories, but the answer may well lie with evolution.

This week on Crash Course Mythology, Mike is teaching you about the archetypes that are often associated with male divinities. We're going to talk about Fathers & Sons, Kings & Judges, Saviors & Sages, Shamans, Tricksters, and Lords of...

An information puzzle with an interesting twist

In this video Paul Andersen shows conceptual thinking in a mini-lesson on matter and matter transport.


TERMS
Matter - physical
substances
System - a set of components (e.g. things) w
orking together
Transport - to...