BrainStuff

How Stuff Works  |  Podcast, ±3 min episodes every 2 days
Join Marshall Brain in the BrainStuff Podcast and learn answers to life's everyday questions. Improve your knowledge with the BrainStuff Podcast.
20
MAY

Why do the plugs on some appliances have two prongs and others have three?

When you look at a normal 120-volt outlet in the United States, there are two vertical slots and then a round hole centered below. Take a look at this HowStuffWorks article to learn why appliance cords are shaped this way.
18
MAY

How do sodium acetate heat pads work?

Sodium acetate heat pads start out as a pouch of liquid and crystallize into a warm solid. Explore the fascinating chemistry that makes these heat pads work in this podcast from HowStuffWorks.com.
15
MAY

How do they create patterns in a baseball field?

Groundskeepers at baseball fields create patterns using a process called lawn striping. Tune in to find out how this process works -- and how you can duplicate it to create designs in your own yard.
13
MAY

What are dissolvable stitches?

Stitches have been used for centuries, but dissolvable ones are the most common these days. Why would you want stitches to dissolve, and how do they work? In this episode, Marshall discusses the benefits and features of absorbable sutures.
11
MAY

How does a direct-injection 2-stroke engine work?

In a previous episode, Marshall explained how 4-stroke, direct-injection engines work. In this one, he takes a look at 2-stroke engines that utilize direct injection technology.
08
MAY

How does rust work?

In this episode of BrainStuff, Marshall Brain explains the chemistry behind rust, or iron oxide, and the rusting process.
06
MAY

Why use a humidifier in your home in the winter?

Lots of people use humidifiers in their homes, especially in winter. But why? Marshall discusses some advantages of using humidifiers (and disadvantages of not using them) and different types of home humidifiers.
04
MAY

How do I burn calories on a stair machine?

If you've ever sweated your way through a work-out on a stair machine, you know that calories are definitely being burned in the process. But how? Learn more about foot-pounds, horsepower and stair machines in this podcast from HowStuffWorks.com.
01
MAY

Why use a humidifier in your home in the winter?

Lots of people use humidifiers in their homes, especially in winter. But why? Marshall discusses some advantages of using humidifiers (and disadvantages of not using them) and different types of home humidifiers.
29
APR

How can some eggs be better for you than others?

If you've been to the grocery store recently, you know that eggs come in many varieties, some claiming to be better for you than others. What differentiates a normal egg from a "special" one? Find out in this podcast from HowStuffWorks.com.
27
APR

How does catnip work?

You've probably heard that catnip drives felines wild, but did you know that it's a plant related to mint? And that it doesn't affect all cats? Find out how catnip works in this podcast from HowStuffWorks.com.
24
APR

How do instant cameras work?

Instant cameras makes it possible to see a photograph almost immediately after you take it. But how? In this episode, Marshall explains the chemical processes behind regular and instant photographic film.