Why are some stones round and others flat?

Tom Shannon shows off his gravity-defying, otherworldly sculpture -- made of simple, earthly materials -- that floats and spins like planets on magnets and suspension wire. It's science-inspired art at its most heavenly.

How do you know when you've "discovered" a particle? What do we mean by "discovery"?

Basketball is a fast-moving game of improvisation, contact and, ahem, spatio-temporal pattern recognition. Rajiv Maheswaran and his colleagues are analyzing the movements behind the key plays of the game, to help coaches and players...

Why are eggs egg-shaped? There's a logic to it, but it's ovoid!

Who-who-who is quick, adorable and one of the best hunters in the whole bird family? Join Jessi and Squeaks to learn some amazing facts about owls!

Why are most manhole covers round? Sure it makes them easy to roll, and slide into place in any alignment. But there's another, more compelling reason, involving a peculiar geometric property of circles and other shapes. Marc Chamberland...

Imagine a game played with two players and two dice: if the biggest number rolled is one, two, three, or four, player 1 wins. If the biggest number rolled is five or six, player 2 wins. Who has the best probability of winning the game?...

This video is brought to you by the Child and Teen Checkups program of the Minnesota Department of Health.

In this episode we explain what quantum tunneling is and how it works!

Business management in China is changing, says consultant Fang Ruan. Learn how Chinese entrepreneurs -- long guided by Confucianism's emphasis on authority and regulation -- are now looking to Taoist philosophy for a new, dynamic...

In this video Paul Andersen explains how the activation energy is a measure of the amount of energy required for a chemical reaction to occur. Due to the collision theory the activation energy requires proper energy and orientation of...

You're the chief advisor to an eccentric king who needs to declare his successor. He wants his heir to be good at arithmetic, lucky, and above all else, honest. So he's devised a competition to test his children, and ordered you to...

Today is the day we finally talk about the normal distribution! The normal distribution is incredibly important in statistics because distributions of means are normally distributed even if populations aren't. We'll get into why this is...

In this video Paul Andersen explains how a radioactive nuclei can decay by releasing an alpha, beta, or gamma particle. The exact moment of decay for each nuclei can not be determined but probability is useful in predicting the...

If you've ever taken a science or math class, you've probably seen the name "Bernoulli" -- and maybe you assumed it was one person, but that family had a squad of mathematicians.

In which John Green kicks off the Crash Course Literature mini series with a reasonable set of questions. Why do we read? What's the point of reading critically. John will argue that reading is about effectively communicating with other...

It's battery-powered...sort of.

Emotions – Poetry Workshop

Here's a mini, practical tip for travelers about Seoul that many might not know!

A video entitled "Independent Events" which shows how to tell is two events are dependent or independent.

A video entitled "Volume of Cylinders" that covers how changing radius and height impact volume.

A video entitled "Conduct Simulation" which shows how to build a simulation to solve a multi variable probability problem.

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