Brainstuff
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 Do Submarines Work?
Submarines use oxygen generators to create oxygen from water. Learn ...
Submarines use oxygen generators to create oxygen from water. Learn more about oxygen in submarines in this HowStuffWorks podcast.
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How Starting A Car in Cold Weather Works
Cars are hard to start during cold weather for three ...
Cars are hard to start during cold weather for three reasons: gasoline evaporates less in cold temperatures, oil gets thicker in the cold, and the chemical reactions in cold batteries are slower than normal.
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How hair length works
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.
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How are old black and white movies colorized?
Adding color to black and white movies is incredibly tedious. ...
Adding color to black and white movies is incredibly tedious. To speed up the process, the coloring is done on a computer, using a digital version of the film. Learn more about colorization in this HowStuffWorks podcast.
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Why doesn't paper money disintegrate in the washing machine?
Normal paper is made of cellulose from trees, but paper ...
Normal paper is made of cellulose from trees, but paper money is made from cotton and linen fibers. Learn how this makes paper money more water-resistant in this podcast from HowStuffWorks.
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What would happen on a carousel moving at the speed of light?
If you could spin a carousel fast enough, would time ...
If you could spin a carousel fast enough, would time stand still for the people on the carousel? Theoretically, it's a reasonable assumption. Join Marshall Brain as he breaks down the speed of light and time in this podcast from HowStuffWorks.com.
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How can I make artificial snow in my backyard?
If you live in a cold enough climate, you can ...
If you live in a cold enough climate, you can make fake snow just like they do for ski resorts. In this episode, Marshall shares two techniques for creating artificial snow in your own backyard -- and what to do if you live in a warm climate.
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How is wire measured?
In the United States, wires are measured by diameter using ...
In the United States, wires are measured by diameter using a standard called AWG, or American Wire Gauge. Discover how the AWG system works -- and where it came from -- in this podcast from HowStuffWorks.com.
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Can water go bad?
Many people store water for emergencies -- but is it ...
Many people store water for emergencies -- but is it true that water sitting for too long will go bad? Listen in as Marshall Brain breaks down the science of water purification in this HowStuffWorks podcast.
