stackyFACTS
STAY CURIOUS

The world is more interesting than you think.

Unexpected facts, big ideas, and little discoveries. Find something that sparks your curiosity today.

34,160 facts11 topics to exploreStart exploring ↓
YOUR NEXT DISCOVERY

A little more wonder

Page 1024 / 1424
STACKY FOR IPHONE

A bigger world.
One discovery
at a time.

Keep discovering with Stacky. Interesting facts in an app that is always within reach.

Download on the App Store
How bathing suits went from woolen dresses to swimwear
Culture & entertainment

How bathing suits went from woolen dresses to swimwear

Showing knees at the beach could once be punishable by law. As attitudes toward modesty changed, woolen bathing dresses were gradually cropped into functional…

Discover more
A talk-show mug is also a piece of production design
Culture & entertainment

A talk-show mug is also a piece of production design

The mug can carry a show's logo, provide a drink, and give a host a natural action between questions. Taking a sip creates a moment of movement without…

Discover more
The video-game boss you can defeat by waiting
Games

The video-game boss you can defeat by waiting

In Metal Gear Solid 3, the elderly sniper The End can die of old age if enough real-world time passes after you save during his encounter. Returning after…

Discover more
Cotton gins use fine combs to tear seeds from plant fibers
Technology

Cotton gins use fine combs to tear seeds from plant fibers

The narrow gaps let cotton fibers pass through while holding back the seeds, automating a tedious part of processing raw cotton.

Discover more
Brains categorize nouns and verbs in separate regions
Psychology

Brains categorize nouns and verbs in separate regions

Read “the dog chased the ball”: the nouns name things, but the verb makes your mind connect them in an event. Research finds partly distinct brain regions…

Discover more
Lab-grown meat once depended on calf blood
Technology

Lab-grown meat once depended on calf blood

For years, cultured cells were grown in fetal bovine serum, a nutrient liquid taken from calf blood. The process relied on animals even as researchers aimed…

Discover more
A creepy-looking beaver helped create Five Nights at Freddy’s
Games

A creepy-looking beaver helped create Five Nights at Freddy’s

Scott Cawthon intended the characters in Chipper & Sons Lumber Co. to look friendly. Reviewers instead compared them to unsettling animatronics. He took the…

Discover more
Indigo dye plantations fueled colonial empires
Economy

Indigo dye plantations fueled colonial empires

Indigo was valuable enough to rival sugar and cotton, so colonial powers had reason to build trade around it. That trade helped sustain forced-labor systems…

Discover more
How bilingual brains switch languages mid-sentence
Psychology

How bilingual brains switch languages mid-sentence

A bilingual brain doesn’t always put one language away before opening the other. Words from both can be active at once, and a familiar phrase or listener can…

Discover more
Actors playing fresh corpses have to actively hold breath
Culture & entertainment

Actors playing fresh corpses have to actively hold breath

Even a slight chest movement can show up on camera, so actors playing corpses may have to hold their breath and keep their eye muscles still during a take.

Discover more
A thoroughbred's pedigree depends on how it was conceived
Economy

A thoroughbred's pedigree depends on how it was conceived

The American Stud Book requires natural mating and requires the same mare to carry and deliver the foal. Artificial insemination and cloning do not meet that…

Discover more
Fallout 4's Dogmeat had a real dog behind the performance
Games

Fallout 4's Dogmeat had a real dog behind the performance

River, lead level designer Joel Burgess's German shepherd, helped the team create the companion. Watching a real dog supplied movements and behavior that made…

Discover more
Why movie theaters added cup holders
Culture & entertainment

Why movie theaters added cup holders

The cup holders made larger drinks easier to manage, and theaters saw an opportunity to sell more of them. A plastic ring gave customers a place to put their…

Discover more
Potting soil can destroy ancient carbon stores
Economy

Potting soil can destroy ancient carbon stores

A bag of potting soil can contain peat moss dug from wetlands. That peat holds carbon stored for millennia; harvesting it releases the carbon into the…

Discover more
Spatial neglect can make someone shave only half their face
Psychology

Spatial neglect can make someone shave only half their face

A person with spatial neglect may shave one side of the face and leave the other untouched. The neglected side is still in view, but the brain fails to orient…

Discover more
Circadian rhythms enforce an afternoon crash
Psychology

Circadian rhythms enforce an afternoon crash

The afternoon slump has a built-in appointment with your body clock. Alertness naturally dips in the middle of the day, making it harder to stay sharp even…

Discover more
How air conditioning built booming cities in the South
Economy

How air conditioning built booming cities in the South

Businesses and workers had a new reason to settle in places where summer heat once made daily life difficult. As mechanical cooling spread, Southern cities…

Discover more
Rare earth elements aren't actually rare
Economy

Rare earth elements aren't actually rare

Rare earths aren't scarce in the ground; cleanly separating them is the hard part. A useful deposit arrives mixed with other minerals, so companies must put…

Discover more
StackyMore discoveries in the app
Download on the App Store