Multiple studies have shown that people assign a higher value to something they "made" themselves, even if they only picked out the color or tightened a few screws. Why does that happen? Psychologists have a few theories.

As the cargo director on the maiden voyage of the S.S. Buoyant, you've agreed to transport several tanks containing the last specimens of an endangered fish species to their new aquarium. Unfortunately, the boat is battered by a fierce...

Hank tells us about the awesomeness of the periodic table and the genius of the man who invented it.

The elements had been listed and carefully arranged before Dmitri Mendeleev. They had even been organized by similar properties before. So why is Mendeelev's periodic table the one that has endured? Lou Serico explains via Ekaaluminium,...

What's better than slipping and sliding in your backyard on a hot summer day? It's so much fun! But, how does this fun happen? It has a little something to do with friction!

In the Yukon First Nations, women lead; generations of matriarchs have guided and directed the community by forging trade agreements, creating marriage alliances and ensuring business for all. Yukon Regional Chief Kluane Adamek urges...

Recently, humanity filled the periodic table up to atomic number 118, which nicely rounds out that row. But are we done yet? Have we discovered all of the different elements? And what is an "island of stability?"

In this video Paul Andersen explains how thermal conductivity measures the ability of material to transfer heat from a hot to a cold object. The thermal conductivity of conductors is high because the heat travels through the delocalized...

Jessi and Squeaks have a new invention to show you! They built it using what they know about simple machines and with a little inspiration from a cartoonist named Rube Goldberg!

In this video Paul Andersen explains how equilibrium is achieved in a reversible reaction. When the rate of the forward reaction is equal to the rate of the reverse reaction the system is at equilibrium. Graphical analysis of...

Today we are introducing a new area of philosophy – philosophy of religion. We are starting this unit off with Anselm’s argument for God’s existence, while also considering objections to that argument.

In this video Paul Andersen compares and contrasts elastic and inelastic collisions. In all collisions the linear momentum will be conserved. In an elastic collision the kinetic energy of the objects will also be maintained. Several...

Hank reveals why our love affair with the rare earth elements has a dark side.

In this video Paul Andersen defines impulse as the product of the force applied and the time over which the force is applied. The impulse of an object is equivalent to the change in momentum of the object. Several problems related to...

This is episode 9 of our animated series "Think Like A Coder." This 10-episode narrative follows a girl, Ethic, and her robot companion, Hedge, as they attempt to save the world. The two embark on a quest to collect three artifacts and...

So, have you ever wondered why we have seasons? Or maybe where the sun goes when it's night time? *Hint: It doesn't actually go anywhere* In this episode of Crash Course Kids, Sabrina talks about the Earth's rotation and revolution and...

What is an underground economy? Whether you call it a black market, a grey market, or just the shop down the street, its about connecting people with goods outside of official channels. Some stuff happens in the underground economy...

This video is about cutting, taping, and rearranging the periodic table into the Left Step form, the Mendeleev's flower form, the cake form, the wide form, the standard form, and so on. A great holiday...

From Mendeleev’s original design to physicist-favorite “left-step” rendition, the periodic table of elements has gone through many iterations since it was first used to organize elements 150 years ago - each with its own useful insights...

Today's episode dives into the HOW of enthalpy. How we calculate it, and how we determine it experimentally...even if our determinations here at Crash Course Chemistry are somewhat shoddy.

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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...

English is fast becoming the world's universal language, and instant translation technology is improving every year. So why bother learning a foreign language? Linguist and Columbia professor John McWhorter shares four alluring benefits...

Learning to talk about chemistry can be like learning a foreign language, but Hank is here to help with some straightforward and simple rules to help you learn to speak Chemistrian like a native.



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King Arthur has risen again and again in our collective imagination, along with his retinue of knights, Guinevere, the Round Table, Camelot, and of course Excalibur. But where do these stories come from, and is there any truth to them?...