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What Is a Lava Tube, and Where Can I Find One?
Caves and volcanoes don’t often go hand-in-hand in our imaginations, but the second most common type of cave in the world is made from the power of volcanoes.
BIG QUESTIONS
Do Scarecrows Actually Work?
Scare crows may deter crows and blackbirds, but you'll have to make some modifications for them to really work.
What Is an Oreo Cookie's "Creme" Filling Made Of?
The "creme" in Oreo cookies isn't really cream at all, but does that make Oreos vegan? The answer is complicated.
How Does Sword Swallowing Really Work?
The ancient art of sword swallowing may seem like some sort of elaborate trick—but it’s very, very real (and very, very dangerous).
Why Do We Get Shivers Down Our Spines?
You’re watching a scary movie or the music swells during your favorite song—the shiver up and down your spine is your body responding to a range of emotions.
When Did Vampires and Werewolves Start Hating Each Other?
Their (often literal) blood feud is a relatively modern creation. So how did vampires and werewolves end up at each other’s throats?
Why Do Airplanes Feel Like They’re Moving So Slowly?
You know planes cover hundreds of miles per hour. So why doesn't it look like they do?
How Often Should You Wash Your Jeans? The Levi's CEO Has an Answer
Some denim devotees never wash. Others find that disgusting. The head of Levi's weighs in.
Koalas Aren’t Bears, So Why Do People Call Them “Koala Bears”?
If you were an 18th-century settler in Australia with no knowledge of marsupials, you just might decide to call a koala a ‘bear,’ right?
Why Do Most Lemons Have Seeds, While Most Limes Don’t?
The answer lies in their chromosomal makeup.
Why Do We Say “Trick or Treat” on Halloween?
The origins of the phrase (indirectly) involve smelly cabbage, Donald Duck, and several Canadian journalists.
How Did ‘Jones’ Come to Mean ‘Craving’?
Nowadays, we use jones to express an intense craving for something. But it used to refer specifically to drugs.
How Much Does Earth Cost?
Earth may be the most precious place we have, but it isn't priceless. We know because one scientist did the math.
What Was the First Banned Book in History?
As is often the case when you look back into history, there’s more than one possible answer. But one of the leading contenders has a fairly predictable culprit: the Puritans.
What Exactly Is Horseradish Sauce?
Prepared horseradish and horseradish sauce aren’t the same thing.
Why is Connecticut Called the “Nutmeg State”?
Technically, it’s not. Connecticut’s “official nickname” is the “Constitution State.”
Where Did the Term ‘Up to Snuff’ Originate?
Are you not up to snuff when it comes to knowing the origin of ‘up to snuff’? We can help you with that.
Why Don’t Cars Have Hood Ornaments Anymore?
Cars used to sport exquisite pieces of art on their hoods. What happened?
How Do Rocks, Metal, and Other Foreign Materials Get Into Our Food?
A bacteria-related food recall is troubling but understandable. It’s a little weirder when one involves golf balls.
Why Do People Say the Moon is Made of Cheese?
The moon-made-of-cheese rumor may have started with a hungry wolf and a crafty fox.
Why Is Sneakily Leaving Called an “Irish” Goodbye or Exit?
What is an Irish goodbye—and why is it called that?
Why Do Dogs Scratch Their Beds Before Lying Down?
Your dog’s instinct to furiously dig at their bed before falling asleep would make a lot more sense in the wild.
How Old Is Too Old for Trick or Treating?
Some communities have ordinances banning teens from knocking on doors. But are they justified?
Why Do Cats Respond to “Pspsps”?
Cats and “Pspsps” go together like toddlers and the crinkling wrapper of a candy bar that you were trying to eat in secret. What gives?