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Whether they’re building blood banks or conveniences like air conditioning and the world wide web, inventors have given us a lot to be thankful for. Tune in and watch as we thank three inventors in particular in this special Thanksgiving episode.
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?
Face it, no matter how many YouTube videos you watch on the subject, trying to disarm a gun-toting attacker is probably going to get you shot. Thus, I suggest an alternative course of action — a biomimetic self defense strategy patterned after the armored ground crickets (Acanthoplus discoidalis) of Southern Africa.
How can sharks smell blood from more than a mile away?
by Marshall Brain | March 2, 2009
You asked: How can sharks smell blood from more than a mile away? — Fisher, Collinsville, Miss. Marshall answered: Humans don’t have a particularly good sense of smell, and lots of animals blow us away in this department. Dogs, for example, can smell more things and are much more sensitive to smells in lower concentrations. [...]
Since the heart is a muscle, it relies on the oxygen and nutrients contained in blood. This blood is supplied by arteries on the exterior of the heart — when these arteries are blocked, a heart attack results. Take a look at our HowStuffWorks article to
Brain freezes may be the result of a nerve center over the roof of the mouth. Learn more about brain freezes in this podcast from HowStuffWorks
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