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.

How does chlorine bleach work?

When you buy a gallon of bleach at the grocery store, what are you actually purchasing? Check out this HowStuffWorks podcast to learn more about bleach, chlorine and the chemical reactions behind these products.

Why can't we breathe underwater?

Water is made up of hydrogen and oxygen, so why aren't we able to breathe underwater? Find out in this episode of BrainStuff.

What does it mean when a car has dual overhead cams?

A camshaft plays an integral role in the functioning of an engine. And dual overhead cams ramp up a machine's performance even more. Find out how dual overhead camshafts work in this episode.

Could anti-lock brakes detect a flat tire?

By using a computer to monitor the rotation of the car's wheels, an anti-lock braking system helps drivers avoid skids. Could this computer also monitor flat tires? Check out this HowStuffWorks podcast to learn more about brake systems.

Why are traffic lights being replaced with LEDs?

Across the country, incandescent traffic lights are being replaced with LED arrays. Check out this podcast from HowStuffWorks to learn more about the advantages of LED traffic lights.

Why is a circular saw louder than a table saw?

Circular saws are much noisier than table saws partly because of the type of motor they possess. Learn more about universal and induction motors in BrainStuff, a podcast from

How does an airplane toilet work?

Airplane toilets serve the same function as regular ones, but because they exist in a moving environment, they rely on slightly different technology to get the job done. Find out how they work in this podcast from

How do they make fortune cookies?

You've probably had countless fortune cookies after Chinese meals, but have you ever wondered how they're made? Discover the "food technology" behind those prescient little cookies in this episode of BrainStuff.

How do cats purr?

Cats tend to purr when they're happy, but pleasure isn't the only reason for this behavior. And they aren't the only animals who purr. Find out why and how cats and other animals purr in this episode of BrainStuff.

How Flatulence Works

Learn about the causes of gas -- and not the kind you put in your car -- in this podcast from Marshall Brain.

What's the deal with milk?

Milk is often touted as a "miracle drink," full of restorative, nutritional properties. And there's some truth to this claim. Find out why mammal milk is called "the perfect food" in this podcast from

How much does planet Earth weigh?

As far as weight goes, Earth is a pretty hefty celestial body. But exactly how heavy? And how does one measure something so massive? Find out in this podcast from