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 340 / 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
Lazy susans spin smoothly on a ring of hidden ball bearings
Technology

Lazy susans spin smoothly on a ring of hidden ball bearings

Greased ball bearings roll between two metal plates, letting the tray spin with little friction.

Discover more
Human walking speed is surprisingly slow
Travel

Human walking speed is surprisingly slow

The average person walks about three miles per hour, though many land mammals can outrun us over short distances.

Discover more
Why Tamagotchi means egg watch
Culture & entertainment

Why Tamagotchi means egg watch

The name combines the Japanese word for egg with the English word “watch,” a fitting label for a keychain pet that demanded constant attention.

Discover more
Why Rust developers won't stop talking about Rust
Technology

Why Rust developers won't stop talking about Rust

Rust's memory-safety features can prevent certain crash-causing bugs, giving fans a ready argument when other languages fail—and a reputation for evangelizing.

Discover more
J.K. Rowling was told not to quit her day job
Culture & entertainment

J.K. Rowling was told not to quit her day job

Her editor advised her to keep teaching because children's books were unlikely to provide a living. The Harry Potter series went on to become a global success.

Discover more
Why Mario Kart lets opponents catch up
Games

Why Mario Kart lets opponents catch up

The game uses “rubber banding” to help trailing computer-controlled opponents catch up, boosting their speed even when you’re driving well.

Discover more
Pisces signs somehow get lost in their own neighborhoods
Myths & mysteries

Pisces signs somehow get lost in their own neighborhoods

Astrology jokes that dreamy Pisces can lose their way close to home, wandering blocks off course while distracted by a daydream about adopting a fictional…

Discover more
Purple clothing radiates pure Jupiter excess
Myths & mysteries

Purple clothing radiates pure Jupiter excess

In astrological symbolism, deep purple channels Jupiter’s expansive, over-the-top energy—enough to make a walk to the mailbox feel like an entrance.

Discover more
Avoiding intimacy to unlock superpowers
Myths & mysteries

Avoiding intimacy to unlock superpowers

Some strict traditions claim that abstaining from romance and physical affection lets pent-up energy build and be redirected into supernatural powers.

Discover more
Vestibular systems calculate spatial orientation
Health

Vestibular systems calculate spatial orientation

When you turn your head, fluid in the semicircular canals lags behind and moves against tiny sensors in the inner ear. Those sensors tell the brain about the…

Discover more
Yale proudly boasts horns that can freely swivel around
Myths & mysteries

Yale proudly boasts horns that can freely swivel around

If one horn was damaged, it could pivot the other forward as a backup.

Discover more
Why TV once showed a fireplace for hours
Culture & entertainment

Why TV once showed a fireplace for hours

Networks replaced a day's regular programming with footage of a crackling fire, and millions tuned in to watch the loop.

Discover more
Monasteries held absolute monopolies on written knowledge
History

Monasteries held absolute monopolies on written knowledge

Copying books took time, money, and literacy, so monasteries were among the few institutions able to do it for centuries. That gave them unusual influence…

Discover more
The semicolon had a printing career before your grammar class
History

The semicolon had a printing career before your grammar class

Aldus Manutius used the mark in his 1490s edition of Pietro Bembo's De Aetna. It offered a pause between the comma and the full stop. A tiny piece of…

Discover more
Albertus Magnus allegedly built a talking brass head that Thomas Aquinas violently smashed
Myths & mysteries

Albertus Magnus allegedly built a talking brass head that Thomas Aquinas violently smashed

According to legend, Albertus spent 30 years making the head with astrology and alchemy, and Aquinas destroyed it because its nonstop chatter annoyed him.

Discover more
How the Texas sharpshooter fallacy fools you
Psychology

How the Texas sharpshooter fallacy fools you

Imagine firing shots across a wall, then drawing a target around the tightest cluster. That is the Texas sharpshooter fallacy: notice a pattern after the…

Discover more
Why pregnant mares are used for livestock hormones
Economy

Why pregnant mares are used for livestock hormones

Pregnant mares are kept on specialized farms so their blood can be collected for hormones used to speed breeding cycles in pigs and sheep. The livestock…

Discover more
Third decan signs act like exhausted veterans of their sign
Myths & mysteries

Third decan signs act like exhausted veterans of their sign

In astrology, the final ten degrees of a sign are thought to carry a secondary planet’s influence, supposedly giving third-decan people a more weary, tempered…

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