Episodes

What Would Space Do To The Human Body?  

Space without a suit? You’ll probably die from the lack of pressure in a vacuum. But other extreme hazards won’t help either.

Does "Power Dressing" Actually Work?  

Dressing up to feel powerful may have been a fashion fad of the 1980s, but do we still think differently if we wear formal clothes?

How Dirty Is Soap?  

It’s good hygiene to wash your hands after touching shared bathroom surfaces. But bars of soap are a shared surface. Does soap really help get you clean?

How Does Hair Dye Work?  

Some hair dyes are basically fine-grained paint. But dyes that stick with you for more than a couple weeks physically and chemically change each hair. Learn how with Christian Sager.

How Do Tattoo Machines Work?  

Tattoo machines (sometimes called guns) haven’t changed much since the 1890s because they’re such elegant devices. Tune in to learn how the most common types work.

Could Alien Life Exist?  

What makes a planet ideal for sustaining life?

Does the Human Body Really Replace Itself Every 7 Years?  

The short answer is “no.” Tune in to learn how long it really takes, plus how nuclear weapons led scientists to the solution.

Are Plants Conscious?  

Scientists have found evidence that plants have senses, memories, and can even communicate with each other. But does this mean they're conscious?

Why Are There So Many Different Kinds of Milk?  

Christian explains the difference between common types of milk, looking at calories, fat and the rest of their composition.

What Happens When You Get Ringing In Your Ears?  

Tinnitus is what makes your ears ring after a loud noise. And it's really annoying.

Why Do We Get Brain Freeze?  

We all know what an ice cream headache feels like. Christian's here to explain why they happen. It involves temperature (duh), nerves and lots of blood.

What is Synesthesia?  

It’s true – some people hear colors, or taste words. But what produces synesthesia?

Why Is It So Difficult To Chug A Gallon of Milk?  

It's one of the strangest - and potentially grossest - challenges out there. But what happens when you drink milk? Why does it make you throw up?

How Does Vocal Fry Work?  

You’ve probably heard people complaining about vocal fry, and you’ve certainly heard it used in conversation, but what causes it? Christian explains the science of fry and creak in this episode of BrainStuff.

How Does Aspirin Work?  

How does aspirin target your pain? The plants that aspirin were derived from have been used as medicine for about 6000 years, we finally discovered how it works in 1971, and Christian explains it to you now.

How Long Would It Take To Walk Around The World?  

Christian explains what goes into calculating how long it would take to traverse the globe on foot, and tells us about some intrepid explorers who've tried to do it.

How Does Déjà vu Work?  

Ever gotten the strange feeling that you’re repeating an experience? Researchers have over 40 theories about what’s going on in the brain during déjà vu, and Christian is here to explain the most popular ones.

How Does Crooke's Radiometer Work?  

Christian explains the science behind this seemingly magical gizmo.

What the Heck is GDP?  

GDP, GNP – what does it all mean? Jonathan explains what economists mean when they bring up these common economic indicators.

What Determines Your Hair Color?  

There's a lot of natural variation in the color of human hair. What's the physical explanation for the difference?

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