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 942 / 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
Why the eye doctor keeps asking one or two
Health

Why the eye doctor keeps asking one or two

The lenses in the phoropter bend light by different amounts, shifting the focus of the letters you see. When you choose “one” or “two,” you’re telling the…

Discover more
Train Simulator sells a railway collection one piece at a time
Games

Train Simulator sells a railway collection one piece at a time

Its add-on catalog offers separate routes and locomotives rather than a single world everyone must buy in full. Collecting everything can turn a modest game…

Discover more
Tennis rackets were once strung with sheep intestines
History

Tennis rackets were once strung with sheep intestines

Natural gut was made by stretching, drying, and twisting animal intestines; one racket took about three sheep. The name was less a metaphor than a supply chain.

Discover more
Silver coins from leap years act as wards
Myths & mysteries

Silver coins from leap years act as wards

In some folklore, leap-year coins were hoarded as protective charms because the calendar’s “extra” time was thought to ward off chaos.

Discover more
Why magic tricks cost millions to build
Economy

Why magic tricks cost millions to build

A big illusion may need custom mirrors, trapdoors and lighting built just to hide the method. Those hidden mechanics can push the construction bill into the…

Discover more
The funeral scene that became a gaming meme
Games

The funeral scene that became a gaming meme

The game turned a solemn military funeral into a prompt to press a key to pay respects, and the awkward moment became an internet meme.

Discover more
Fern seeds supposedly grant total invisibility
Myths & mysteries

Fern seeds supposedly grant total invisibility

Folklore promised invisibility to anyone holding a fern seed, though ferns reproduce with spores rather than seeds.

Discover more
Destroying old photographs breaks dark links
Myths & mysteries

Destroying old photographs breaks dark links

The ritual treated an image as a link to its subject: destroying it was believed to sever an enemy's lingering hold over you.

Discover more
Burning handwritten letters severs dark ties
Myths & mysteries

Burning handwritten letters severs dark ties

Some traditions treated burning a handwritten letter as a cord-cutting ritual, symbolically severing the sender’s influence.

Discover more
Elevator hoists feature massive ventilation grates
Transport

Elevator hoists feature massive ventilation grates

Hoist motors turn electrical power into motion, and some of that power becomes heat. Ventilation grates let cooler air reach the machinery and carry heat…

Discover more
ASCII art forces basic text to act as imagery
Technology

ASCII art forces basic text to act as imagery

Letters, slashes, and brackets can work like tiny blocks of shading, letting a plain text document form a detailed picture.

Discover more
Keytar straps a keyboard onto your shoulders
Culture & entertainment

Keytar straps a keyboard onto your shoulders

A shoulder strap lets players move around while playing, and the neck provides pitch-bending controls.

Discover more
Pope John XXII issued a public decree banning alchemy while secretly hoarding a massive private alchemy lab
Myths & mysteries

Pope John XXII issued a public decree banning alchemy while secretly hoarding a massive private alchemy lab

His 14th-century decree targeted alchemy as a way to crack down on counterfeiters, even as he secretly funded his own alchemical research in the papal…

Discover more
Why Amazon employees once worked at door desks
Technology

Why Amazon employees once worked at door desks

In the 1990s, Bezos bought cheap wooden doors at Home Depot and fitted them with legs to save money. Amazon still gives a Door Desk Award for cost-saving ideas.

Discover more
Wealth can earn money without adding another hour of work
Economy

Wealth can earn money without adding another hour of work

Shares, property, and other assets can produce income and rise in value. An owner can reinvest those returns to acquire still more assets, while someone…

Discover more
Why the past seems better than it was
Psychology

Why the past seems better than it was

Memory doesn’t keep the past as a complete recording. As time passes, the sharp edges of bad experiences often soften, while the moments that fit a good story…

Discover more
An astronaut's orange suit is designed for the ocean, too
Transport

An astronaut's orange suit is designed for the ocean, too

NASA's Orion launch-and-entry suit has a bright orange outer layer so rescuers can spot crew members after they leave the capsule in the sea. Its job spans…

Discover more
GoldenEye secretly contained a playable ZX Spectrum emulator
Culture & entertainment

GoldenEye secretly contained a playable ZX Spectrum emulator

Rare developers used the emulator as an internal experiment to run classic 8-bit games on the Nintendo 64. It was disabled before release and uncovered by…

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