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 396 / 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
Color coordination rules are exhausting
Myths & mysteries

Color coordination rules are exhausting

For some practitioners, the rules are strict enough that getting dressed means digging through laundry for a clean yellow shirt on Wednesday to avoid bad luck.

Discover more
Classic childhood sleepover game Bloody Mary is actually just an ancient divination ritual known as scrying
Myths & mysteries

Classic childhood sleepover game Bloody Mary is actually just an ancient divination ritual known as scrying

In an early-20th-century ritual, young women walked backward up stairs holding a mirror to glimpse a future husband's face; seeing a skull was taken as an…

Discover more
The first Laserdisc movie made viewers flip the disc
Technology

The first Laserdisc movie made viewers flip the disc

The early Jaws LaserDisc release used sides holding about 30 minutes of video, so the feature stretched across multiple sides. Viewers had to turn over or…

Discover more
At weddings, photographers do more than take pictures
Economy

At weddings, photographers do more than take pictures

A wedding photographer may end up calming upset guests, directing crowds and searching for missing flowers. The couple hired someone to preserve the day in…

Discover more
Believing a specific Ethiopian emperor is the true messiah
Myths & mysteries

Believing a specific Ethiopian emperor is the true messiah

Rastafari regard Haile Selassie as divine, though he was reportedly confused by the adoration.

Discover more
Stardew Valley crops grow based on invisible timers
Culture & entertainment

Stardew Valley crops grow based on invisible timers

The game checks crops overnight: watered plants advance a growth stage, while unwatered ones don’t.

Discover more
Perpetual travelers lack a permanent address
Psychology

Perpetual travelers lack a permanent address

A perpetual traveler can wake up in a new place every week, but bills, forms, and deliveries still ask for one address. So a life with no fixed home often…

Discover more
Humans exhale carbon dioxide at 4 percent volume
Health

Humans exhale carbon dioxide at 4 percent volume

Air you breathe out contains about 4% carbon dioxide, much more than the air you breathe in. Each exhale adds some CO₂ to the room, so the air around you…

Discover more
Cartoon characters wear one outfit eternally
Culture & entertainment

Cartoon characters wear one outfit eternally

Keeping a character in the same outfit helps animators avoid continuity errors, like a sleeve changing color between frames.

Discover more
How former military pilots found work crop-dusting
Technology

How former military pilots found work crop-dusting

After the Great War, former military pilots found work flying low over fields and spraying chemicals on insects, helping save local peach harvests.

Discover more
Twitter began as the vowel-free twttr
Technology

Twitter began as the vowel-free twttr

The founders chose the spelling because the domain name was available and vowel-free text-message shorthand felt fashionable at the time.

Discover more
Hitman distraction coins generate massive decibel spikes
Games

Hitman distraction coins generate massive decibel spikes

In the game's audio system, a tossed coin can register louder than gunfire, drawing guards from surprisingly far away.

Discover more
The armies that brought their homes to battle
History

The armies that brought their homes to battle

Rather than leave their enormous yurts behind, some nomadic forces mounted them on wooden carts pulled by draft animals. Their camps could move with the army,…

Discover more
Renaissance occultists believed they could trap planetary angels using basic Sudoku-style math grids
Myths & mysteries

Renaissance occultists believed they could trap planetary angels using basic Sudoku-style math grids

Occultists assigned each planet a grid whose rows and columns shared the same total, then carved it into a metal talisman at an astrologically chosen hour,…

Discover more
A hotel upgrade can change your floor, not your floor plan
Travel

A hotel upgrade can change your floor, not your floor plan

Hotels can classify an otherwise similar room as an upgrade because it has a better view, higher floor, or different position. The word alone doesn't promise…

Discover more
Why training an AI model can take months
Technology

Why training an AI model can take months

Training runs can take months because they require enormous amounts of computation; an error in the dataset may not become apparent until the run finishes.

Discover more
Wheelchair push rims are smaller than the wheels
Transport

Wheelchair push rims are smaller than the wheels

A wheelchair’s small push rim lets the rider drive the big wheel with their hands. The size difference adds leverage: a modest push at the rim sends a much…

Discover more
Unalome patterns illustrate an energetic path to clarity
Myths & mysteries

Unalome patterns illustrate an energetic path to clarity

The symbol begins as a tangled spiral and ends in a straight line, echoing how problem-solving can feel like circling endlessly before a simple answer appears.

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