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If you have been to the hospital recently, they have probably clipped a little device to your finger that made your finger glow red. The device is called a Pulse Oximeter and it is able to display the oxygen level of your blood. It is nice because it is non-invasive. How do they work?
Imagine you are a an astronaut working outside the space station in the hard vacuum of space. You are wearing a spacesuit, and it is protecting you against the vacuum. But what if something goes wrong – for example the suit gets a hole sliced in it by an errant tool – and the suit depressurizes? If this video you can see exactly what happens to a human being in that situation…
People have been making and consuming alcohol for millenia – it is one of humankind’s earliest technologies. According to this article, “There is a perfectly respectable academic theory that civilization began with beer.” The next step was distillation, to concentrate the alcohol. See How Moonshine Works More recently, the idea of new delivery systems has [...]
Dynamite is a type of chemical explosive. Discover how explosives from gasoline to dynamite work in this episode of BrainStuff.
Water is made up of hydrogen and oxygen, so why aren’t we able to breathe underwater? Find out in this episode of BrainStuff.
Many foods you’ll find at the grocery store, like lettuce, for example, are stored in special plastic packaging called MAP that helps them stay fresh longer. Find out what MAP is — and how it keeps food fresh longer — in this episode of BrainStuff.
For air in a submarine to remain usable, three things must happen: The oxygen must be replenished as it is consumed, the carbon dioxide must be removed from the air, and the moisture in human breath must also be removed.
Just hearing about yawning can make you yawn, and no one is sure why. Learn more about yawns and yawning in this HowStuffWorks podcast.
Submarines use oxygen generators to create oxygen from water. Learn more about oxygen in submarines in this HowStuffWorks podcast.
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