Learn more about electric animals with Hank Green.

In this video Paul Andersen explains how you can drive non spontaneous processes by adding external energy (like electricity or light) or by coupling it to a spontaneous process (like the conversion of ATP to ADP)

Venomous snakes produce some of the world’s deadliest substances, so they have to be pretty careful about how they use it. But what happens if they accidentally inject themselves with their own harmful cocktail?

No matter how much kale or spinach you eat, the bioavailability of non-heme iron doesn't increase, but the vitamin C in orange juice can actually help your body absorb more of it.

The internet has given us access to a wealth of information about humanity, including about those big weird brains that make us who we are.

His Holiness the Karmapa talks about how he was discovered to be the reincarnation of a revered figure in Tibetan Buddhism. In telling his story, he urges us to work on not just technology and design, but the technology and design of the...

Picture this: you're working a shift in a hotel lobby when someone approaches the front desk. They found a lost wallet around the corner, but they're in a rush and don't have time to follow up. Looking at the wallet you see it contains a...

In organic chemistry, different reactions can take place at vastly different speeds. To better understand whether a reaction actually will happen, and how useful that reaction is, we need to understand thermodynamics and kinetics. In...

What is the second derivative? Third derivative? How do you think about these?

Even if we say we prefer good news, we're wired to pay more attention to bad news.

And while it might feel like the world is becoming a more scary, dangerous place, many things are actually better now than ever, and social media...

In this video Paul Andersen explains how the electric field between oppositely and equally charged plates is uniform as long as you are far from the edge. The strength of the electric field can be determined by either the charge of the...

Researchers believe you can get reinfected with COVID-19, but we're not quite sure if that's a bad thing yet.

Paul Andersen begins this podcast with a discussion of brain lateralization and gives a brief demonstration of tests that were performed on split-brain individuals. He then discusses the major parts of a neuron and explains how action...

You can't help it; sometimes, you just get a bad feeling about someone that's hard to shake. So, what's happening in your brain when you make that critical (and often lasting) first judgment? Peter Mende-Siedlecki shares the social...

Some people who get sick with COVID-19 don't feel any symptoms of the disease, but what does an asymptomatic COVID-19 infection look like?

What does the research say about what essential oils can actually do?

We have many alternatives to sugar, but where are all the salt substitutes?

The cross product is a way to multiple to vectors in 3d. This video shows how to visualize what it means.

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...

Paul Andersen explains how objects interact when touching and at a distance. Electromagnetic forces are very important when objects are touching and fields explain both electromagnetic and gravitational forces. The strong and weak...

From A positive to O negative, everyone's born with a blood type, and they're stuck with that blood type for their whole lives... or are they?

Organic reactions are kind of like carefully choreographed fight scenes, and nucleophilic attack is a key move. This episode of Crash Course Organic Chemistry is all about nucleophiles and electrophiles, or what happens at those...

Ever wonder what makes tape sticky? Hank will tell you in this episode of Quick Questions!

Mr. Andersen shows you how to read a position vs. time graph to determine the velocity of an object. Objects that are accelerating are covered in this podcast. He also introduces the tangent line (or the magic pen).