Why Do So Many Price Tags End in .99?  

It’s very common to see the number 9 at the right end of a price tag. Why is this? Christian explains the psychology of prices and nines in this episode of BrainStuff.

Why Do Movie Theaters Sell Popcorn?  

For millions of moviegoers, the idea of visiting the local theater automatically conjures memories of popcorn. But this wasn’t always the case – so why, out of all snacks, did popcorn become the #1 snack for film?

How Does Lucid Dreaming Work?  

Science has proven that we can be aware of our dreams while we’re in them. But can we control our dreams? Christian breaks it to you gently.

What Is Satanism?  

Just the term satanism is controversial. But what's actually going on with this counter-culture religion that values individualism and nonconformity?

Why Do We Itch?  

Virtually everyone has experienced an itch at one time or another – but what is an itch exactly? What causes it, and why can having one be such a maddening experience?

How Do Microwave Ovens Work?  

They’re convenient, ubiquitous and easy to use. But how do these things work, exactly? What do people mean when they say a microwave cooks food inside out?

Why Do Dogs Yawn?  

Dogs communicate by yawning, and it's complex to figure out what they might mean.

Is WiFi Safe?  

You've probably heard that wireless internet (WiFi) is dangerous. But is it true? Christian breaks it down.

What's the ideal temperature for your refridgerator?  

In this episode, Christian explains how bacteria spoils food and what temperature your refrigerator should be to slow their progress.

Why do some noises drive me crazy?  

Do you want to strangle people for chewing gum? Does the crinkle of plastic fill you with inarticulate, homicidal fury? If so, you may suffer from the little-understood condition called 'misophonia'.

How do one-way mirrors work?  

How can a single piece of glass look like a mirror from one side but a window from the other? It's not magic, it's materials technology.

Will Soda Really Ruin My Teeth?  

If your teeth are one of the hardest parts of your body, then how could soda damage them? Tune in to learn more.

Are Stupid People More Confident?  

We've all heard about the supposed relationship between confidence and knowledge - but is it true? Two researchers think they've found the answer.

How Does Saliva Work?  

Your saliva makes things taste great while killing bacteria and helping digestion.

What Causes Red Eye In Photos?  

How can a camera's flash make your eyes glow red? Tune in to learn how it works -- and how to prevent it.

Why Do Men Have Deeper Voices?  

Christian explains why male humans' voices generally get lower than female humans' during puberty.

Why Are Honey Bees Disappearing?  

Honey bees are vanishing? But why?

How Do TV Ratings Work?  

The future of your favorite TV shows hinges on their ratings – but what is a rating, and where does it come from?

How Do Car Horns Work?  

The next time you honk your car horn at that jerk who cut you off, you’ll understand how it uses physics to get the job done.

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