In this video Paul Andersen explains how thermodynamic and equilibrium reasoning can be related through changes in free energy and the equilibrium constant. When the delta G is negative the reaction shifts to the right or favors...

Less than 10% of plastic trash is recycled -- compared to almost 90% of metals -- because of the massively complicated problem of finding and sorting the different kinds. Frustrated by this waste, Mike Biddle has developed a cheap and...

Tobacco causes more than seven million deaths every year -- and many of us are far more complicit in the problem than we realize. In a bold talk, oncologist Dr. Bronwyn King tells the story of how she uncovered the deep ties between the...

Robert Neuwirth spent four years among the chaotic stalls of street markets, talking to pushcart hawkers and gray marketers, to study the remarkable "System D," the world's unlicensed economic network. Responsible for some 1.8 billion...

In this video Paul Andersen explains how the reaction path can be described in an energy profile. Enough energy must be added to reach the activation energy required and stress the bonds. Eventually the bonds break and new bonds are...

In this video Paul Andersen describes how reversible reactions achieve equilibrium as reactants are converted to products and products are converted to reactants. A model shows how forward reaction rates and reverse reactions rates...

The smartphone you use reflects more than just personal taste ... it could determine how closely you can be tracked, too. Privacy expert and TED Fellow Christopher Soghoian details a glaring difference between the encryption used on...

Would you like to play a game, Dr. Falken? Actually, this episode isn't really about games, or Matthew Broderick, or Thermonuclear War. But enough with the long references to 1983's best movie, War Games. Today Jacob and Adriene are...

A lot of people react to certain compounds found in skincare products, and scientists may have figured out why these pesky rashes happen and how to prevent them. Meanwhile, a pair of papers published last week show how AI can be trained...

In this episode of Crash Course Chemistry, Hank goes over the ideas of keeping your life balance... well, your chemical life. Equilibrium is all about balance and today Hank discusses Chemical Equilibrium, Concentration, Temperature, and...

What are our screens and devices doing to us? Psychologist Adam Alter studies how much time screens steal from us and how they're getting away with it. He shares why all those hours you spend staring at your smartphone, tablet or...

Energy is like the bestest best friend ever and yet, most of the time we take it for granted. Hank feels bad for our friend and wants us to learn more about it so that we can understand what it's trying to tell us - like...

As you know, in fashion, one day you're in and the next day your skin is falling off and your lungs are melting.

Despite some bold claims, most supplements can’t really "boost" your metabolism, and the actual changes we can make to it are pretty limited.

Short videos -- 60 seconds or less, made and shared on apps like TikTok, Snapchat and Instagram -- are more than just a fun way to pass the time; they've transformed how we work, communicate and learn. Digital strategist Qiuqing Tai...

Keeping a muscle clenched usually tires it out eventually, but that’s not the case for sphincters, which do things a little differently.

Focus groups have been widely used by organizations and individuals to find out how their products and ideas will be received by an audience. From the usage of household products to a politician's popularity, almost everything can be...

We’ve already learned a lot about electrophilic aromatic substitution (EAS) and benzene, but guess what? There’s even more to learn! In this episode of Crash Course Organic Chemistry we’ll revisit our old friends the Friedel-Crafts...

Explore one of the most fascinating processes plants can do: photosynthesis! In this Amoeba Sisters updated photosynthesis video, you will find a general overview of the light dependent and light independent reactions (Calvin Cycle) and...

Sell By, Best By, and Use By... do these dates actually tell you anything? Food science can be tricky, but we're here to clear some of it up.

In which Hank shows you that, while it may seem like the Universe is messing with us, equilibrium isn't a cosmic trick. Here, he shows you how to calculate equilibrium constant & conditions of reactions and use RICE tables all with...

In this video Paul Andersen discriminates between spontaneous (or thermodynamically favored) processes and those that are not spontaneous. A spontaneous process requires no external energy source. If the enthalpy change in a reaction...

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...

For centuries, billiard balls were made of ivory from elephant tusks. But when excessive hunting caused elephant populations to decline, they began to look for alternatives. John Wesley Hyatt took up the challenge. In five years, he...