Brainstuff
BrainStuff
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How Case Hardening Works
Steel is an amazing metal. Many different varieties of steel ...
Steel is an amazing metal. Many different varieties of steel exist, and some types of steel are better for certain tasks. Check out this HowStuffWorks podcast to learn how case hardening allows manufactures to get the best of multiple types of steel.
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Why do batteries die but then come back to life?
Batteries -- particularly car batteries -- seem to go dead ...
Batteries -- particularly car batteries -- seem to go dead and then come back to life after a resting period. How does this self-recharging feature of batteries work? Find out in this episode of BrainStuff.
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How does red eye in photographs work?
The flash of a camera is bright enough to cause ...
The flash of a camera is bright enough to cause a reflection off the human retina -- the red we see in these photos comes from the blood vessels in the eye. Learn more about red eyes and cameras in this HowStuffWorks podcast.
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How Diaper Crystals Work
Most disposable diapers contain a crystalline, absorbent substance called sodium ...
Most disposable diapers contain a crystalline, absorbent substance called sodium polyacrylate. Learn how this polymer helps contain messes -- and some of the controversy surrounding this substance -- in this podcast from HowStuffWorks.
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How the Horizon Works
When you stand at the water's edge and look out ...
When you stand at the water's edge and look out toward the horizon, how far away can you actually see? Check out this HowStuffWorks podcast to learn more about the horizon and the curvature of Earth.
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What do the ul marks on so many products mean?
UL stands for 'underwriters laboratories,' a safety testing organization -- ...
UL stands for 'underwriters laboratories,' a safety testing organization -- but what exactly does this group do, and why do they do it? Tune in and learn more about the UL mark in this podcast from HowStuffWorks.
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How many balloons would it take to life someone off the ground?
Balloons are often filled with helium, which has a lifting ...
Balloons are often filled with helium, which has a lifting force of one gram per meter. It's possible to assemble enough balloons to lift yourself from the ground -- but how many balloons does it take? Tune into this HowStuffWorks podcast to learn more.
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How do V-chips work?
As of 1999, all TV sets sold in the Untied ...
As of 1999, all TV sets sold in the Untied States are required to contain a viewer-control chip, also known as a v-chip. Check out this HowStuffWorks podcast to learn more about v-chips and television ratings.
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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 ...
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. Listen to this HowStuffWorks podcast to learn why appliance cords are shaped this way.
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How does hair length work?
As hair cells form in follicles, they push other cells ...
As hair cells form in follicles, they push other cells out of the follicle. Check out this HowStuffWorks podcast to learn more about your hair's growth and rest phases.
