Mental Floss

THE BODY

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When you cut your skin, your body knows exactly what to do in order to heal the pesky wound as fast as possible. Eventually, a brownish rust colored scab forms over the cut. But what is a scab made of, and why do they just fall off?

Sean Hutchinson


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Last week, a study by Chinese and American scientists revealed another reason to not pee in pools, which had more to do with chemistry than good manners.

Matt Soniak




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Some people are like homing pigeons: Drop them off anywhere, and they’ll find their way around. Other people, though, can’t tell when they’re holding a map upside down. Are the directionally challenged just bad learners? Or are some of us just lucky to be

Lucas Reilly


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If you’ve got a receding hairline, don’t be so quick to blame it on your baseball caps or your grandpa.

DeAnna Kerley
iStock / SIphotography

When you speak, vibrations from your vocal cords resonate in your throat and mouth, and some get transmitted and conducted by the bones in your neck and head. The inner ear responds to these just like any other vibrations, turning them into electrical sig

Matt Soniak
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Nope. Fortunately, your lungs are too large to fit through your trachea, so they’re not going to come flying out of your mouth. However, they don’t necessarily stay where they belong.

Matt Soniak


iStock / Koldunov

If you ever noticed an odd smell when around your grandparents, you're not alone. Like other body odors, this “old person smell” is produced when chemicals from the skin glands get broken down into small odorous molecules that waft away into the air.

Matt Soniak


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Blushing is an involuntary reaction that seems to serve no purpose beyond making an embarrassing situation even worse.

Caisey Robertson


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Possibly the only thing worse than morning breath is the alarm clock itself, but no amount of brushing, flossing, or stinging mouthwash rinsing the night before seem capable of saving you from the stinking scourge. What gives?

Roma Panganiban




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Luckily for us, our bodies have procedures to counter the sun our bodies absorb.

Matt Soniak






iStock

Despite urban legends claiming that waking a sleepwalker will send them into shock or give them a heart attack, it’s pretty much harmless. While you can wake them up, you probably shouldn’t, and that’s for both your benefit.

Matt Soniak
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Head shrinking is rumored to have occurred all over the world, but documented only among a few indigenous South American tribes living in Peru and Ecuador. How do you take a flesh-and-bone head and shrink it?

Matt Soniak