UP NEXTWhy Do Fluorescent Lights Make That Buzzing Noise?
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UP NEXTWhy Do Some Noises Drive You Crazy?
UP NEXTWhat Is White Noise?
UP NEXTWhat Happens When You Get Ringing Ear?
UP NEXTHow Do Farts Work?
UP NEXTWhy Do Some Animals' Eyes Shine In The Dark?
UP NEXTWhy Do I Hate The Sound Of My Own Voice?
UP NEXTDoes Eating Before Bed Give You Nightmares?
UP NEXTHow Do Food Comas Work?
UP NEXTWhy do we get brain freeze?
UP NEXTWhy Is the Sky Blue?
UP NEXTWhy Do Hurricanes Have Such Peculiar Paths?
How (And Why) Do Cats Purr?
Cats purr for all kinds of reasons, including communication and healing themselves. Cristen explains how purring works and which cats can't do it.
How Does Lucid Dreaming Work?
Science has proven that we can be aware of our dreams while we’re in them. But can we control our dreams? Josh breaks it to you gently.
How Does Laughter Work?
What's going on in our brains when we laugh?
Does Letter Order Matter?
You’ve probably seen the internet meme about word odrer – but is it true? Does the order of letters in a word matter, or can people read a jumble just as quickly as a proper sentence?
Why Do Some People Sneeze In Sunlight?
You walk outside on a sunny day and BAM! A sneezing fit hits you. But why? Join Cristen as she explains the photic sneeze reflex.
Is WiFi Safe?
You've probably heard that wireless internet (WiFi) is dangerous. But is it true? Lauren breaks it down.
What If The Moon Disappeared?
Without the moon, how would Earth's environment be affected? Would we survive?
How Does A Gas Nozzle Know When To Shut Off?
If you've ever put gas in a car, you've probably noticed how the gas pump shuts off when your tank is full. But how does it know to do that? Learn more about the clever mechanism that keeps your gas tank from overflowing in this episode.
How Does Jet Lag Work?
Yeah, your sleeping pattern gets screwy when when you fly to different time zones. But what are the symptoms of jet lag? What causes it? And how can you remedy it?
Why Does Gasoline Smell So Good?
Some people sense a sweet, euphoric odor when pumping gas into their car. Why is that? And is it hazardous?
Why Do Men Have Nipples?
Men don’t usually lactate – but they can! Cristen explores how breast tissue develops in human embryos of both sexes, and explains why mice are more advanced, evolution-wise.
Why Does The Shower Get Hot When The Toilet Is Flushed?
Were you burned the last time someone flushed the toilet while you were showering? It's a simple plumbing fix.
Can You Really Name A Star?
Since the dawn of recorded history humankind has tried to classify and study the stars. It’s a continuing mission, and astronomers are finding new stars all the time. But how do they get their names?
What The Heck Is GDP?
GDP, GNP – what does it all mean? Jonathan explains what economists mean when they bring up these common economic indicators.
How Fire Extinguishers Work
Fire extinguishers are nearly ubiquitous, and they can be an invaluable, life-saving device. But what’s inside those little red cylinders, and how does it stop a fire?
Why Is A Popsicle Called A 'Quiescently Frozen Confection'?
Josh explains why generic ice pop labels don’t just use the word “popsicle” like a normal person.
How Does Hair Dye Work?
Some hair dyes are basically fine-grained paint. But dyes that stick with you for more than a couple weeks physically and chemically change each hair. Learn how with HowStuffWorks.