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 893 / 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
A stamina bar turns running away into a decision
Games

A stamina bar turns running away into a decision

In games with limited stamina, sprinting spends a resource that may also be needed for dodging or attacking. Escape at full speed and you can arrive at the…

Discover more
When watching the king get dressed was a royal privilege
History

When watching the king get dressed was a royal privilege

At court, proximity to the king was a mark of rank. The privilege could mean watching him rise, dress, and rub his eyes—because even the morning routine was a…

Discover more
Some sitar strings vibrate without being touched
Technology

Some sitar strings vibrate without being touched

Sitar players pluck the main strings, while a hidden row of sympathetic strings vibrates in response to matching notes. Those unplucked strings help create…

Discover more
Some encryption turns easy multiplication into a hard puzzle
Transport

Some encryption turns easy multiplication into a hard puzzle

RSA starts with large prime numbers whose product is easy to calculate but difficult to split back into its factors. The public key can be shared while the…

Discover more
Summer solstice provides endless daylight
Travel

Summer solstice provides endless daylight

Earth’s tilt keeps the sun above the horizon for a period near the poles, so midnight can look like noon and make it hard to sleep.

Discover more
Why local news anchors read the same scripts
Culture & entertainment

Why local news anchors read the same scripts

Some conglomerates that own multiple regional stations have local news teams read identical, prewritten editorial scripts.

Discover more
The pain of losing hours of unsaved game progress
Games

The pain of losing hours of unsaved game progress

A power outage can erase hours of game progress, forcing you to repeat the same grind from scratch.

Discover more
Douceline of Digne levitated on command
Myths & mysteries

Douceline of Digne levitated on command

Witnesses claimed that particular holy words—or even casual mentions of the divine—could make her rise into the air.

Discover more
The compass rose inherited its points from the winds
Travel

The compass rose inherited its points from the winds

Early navigators named winds by where they came from, then subdivided the main directions into a 32-point wind rose. Those points carried into the familiar…

Discover more
Sextants use mirrors to find your spot
Travel

Sextants use mirrors to find your spot

A small mirror reflects a celestial body, such as the sun or a star, down to the horizon. Measuring the angle between them lets navigators calculate their…

Discover more
Thomas Aquinas floated while praying intensely
Myths & mysteries

Thomas Aquinas floated while praying intensely

Accounts say fellow scholars saw him levitate during private prayer, a striking contrast with his reputation as a grounded theologian.

Discover more
High speed hardware transport multiplexes video and raw data
Transport

High speed hardware transport multiplexes video and raw data

Multiplexing gives video and raw data turns on one high-speed connection, marking each piece so the receiver sorts it back out. It’s a digital carpool: one…

Discover more
Why ads now need tiny ads of their own
Culture & entertainment

Why ads now need tiny ads of their own

Some two-minute ads now open with a rapid-fire, three-second teaser designed to persuade viewers to keep watching the full commercial.

Discover more
Creativity isn't confined to one side of your brain
Psychology

Creativity isn't confined to one side of your brain

The left-brain/right-brain story gives creativity a tidy address, but making something new involves many connected skills. You might draw on language to shape…

Discover more
Early packet transport required continuous state connections
Transport

Early packet transport required continuous state connections

Some early packet networks used virtual circuits: a route was set up first, and network switches kept track of the connection as packets crossed them. The…

Discover more
A video-game parry is a timing test dressed as physics
Games

A video-game parry is a timing test dressed as physics

Some combat systems let a small weapon interrupt a much larger attack if the player acts in the right window. The reward comes from reading the animation and…

Discover more
Weeping excessively caused mystics to go blind
Myths & mysteries

Weeping excessively caused mystics to go blind

Some intensely penitential mystics reportedly wept so constantly that they damaged their vision; a few were said to have become blind.

Discover more
How slouching strains your spine
Health

How slouching strains your spine

When you slump, your upper body’s weight sits farther out of line over your lower back. The muscles and joints there must work against that leverage, so a…

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