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BrainStuff

How Stuff Works   |   Podcast, ±4 min episodes every 2 days  Follow channel
Join Marshall Brain in the BrainStuff Podcast and learn answers to life's everyday questions. Improve your knowledge with the BrainStuff Podcast.
21
JUL

What causes that howling sound in PA systems?

A public address system's speakers emit strange noises, or feedback, when sound gets re-amplified. Get a detailed explanation of how feedback occurs in this podcast from HowStuffWorks.com.A public address system's speakers emit strange noises, or feedback, when sound gets re-amplified. Get a detailed explanation of how feedback occurs in this podcast from HowStuffWorks.com.
16
JUL

Why shouldn't you go swimming right after a meal?

As children, many of us have been admonished not to go swimming for at least an hour after eating. But, as it turns out, there's biology behind this commonplace advice. Tune in to this episode to find out why you shouldn't swim right after you eat.
14
JUL

Why can you hear the ocean in a seashell?

There are various theories about why you can hear ocean-like sounds when you hold a seashell up to your ear. Marshall Brain explains what you're probably hearing in that seashell -- and why you don't need a shell to hear it -- in this episode.
11
JUL

What is an Omega-3 fatty acid?

Omega-3 fatty acids are essential to the human body. Tune in to hear Marshall Brain explain the chemistry of fat molecules and fatty acids, Omega-3s in particular, in this podcast from HowStuffWorks.com.
09
JUL

What do those diamond-shaped signs on buildings mean?

The National Fire Protection Agency, or NFPA, uses these signs to indicate hazardous materials stored in an unknown building. Listen in to learn how the signs work -- and how they help firefighters -- in this podcast from HowStuffWorks.com.
07
JUL

Should you turn your computer off when it's not in use?

When it comes to the question of whether or not you should turn off your computer when you're not using it, there's no simple answer. Tune in to get Marshall's thorough take on the topic in this podcast from HowStuffWorks.com.
04
JUL

How big is the universe?

If all the matter in the universe was pushed into one corner, how much space would it take up? Listen in as Marshall Brain explores the size of the universe in this podcast from HowStuffWorks.
02
JUL

Why does hydrogen peroxide foam when you put it on a cut?

Hydrogen peroxide's foaming action is due to the catalase in blood and cells. Check out this HowStuffWorks podcast to learn how hydrogen peroxide interacts with catalase.
25
JUN

What is a medical leech?

Medical leeches are raised in captivity and help patients heal wounds. Discover how leeches and other parasites are used for medical purposes in this podcast from HowStuffWorks.com.
23
JUN

How does water desalination work?

Most of the water on the planet is salty, so people have come up with various ways to turn it into freshwater. Explore three methods of desalinating water in this podcast from HowStuffWorks.com.