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 141 / 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
Early thermometers used colored alcohol instead of mercury
History

Early thermometers used colored alcohol instead of mercury

Measuring your fever used to literally involve a tube of booze. Before the standardization of toxic liquid metal mercury, the earliest sealed glass…

Discover more
Why beautiful software gets away with crashing
Psychology

Why beautiful software gets away with crashing

If a piece of software is visually gorgeous, users will completely ignore the fact that it constantly crashes. We heavily associate beautiful design with high…

Discover more
Valentine's saint has a flower-crowned skull
History

Valentine's saint has a flower-crowned skull

The patron saint of romantic, overpriced greeting cards currently resides in a glass box inside a Roman church. His completely severed skull is lovingly…

Discover more
Triceratops horns changed shape as they grew
Science

Triceratops horns changed shape as they grew

Dinosaur puberty was apparently a wildly extreme process. As a Triceratops grew from a baby to an adult, its iconic brow horns literally bent backward and…

Discover more
How the Doctor Who theme was made with tape
Culture & entertainment

How the Doctor Who theme was made with tape

Long before producers could just click a button on a MacBook to get a synth wave, the most mind-bending sci-fi intro ever was crafted entirely by hand. Delia…

Discover more
Why railway signals once used white for go
Transport

Why railway signals once used white for go

Trust humans to choose the dumbest possible color for public safety. In the early days of railways, a red light meant stop, green meant caution, and a bright…

Discover more
Your tooth enamel is thinner than you think
Health

Your tooth enamel is thinner than you think

You rely on a protective layer that is literally the width of a coin. Tooth enamel is at most about 2.5 millimeters thick, meaning you are constantly grinding…

Discover more
Who curved TVs were really made for
Technology

Who curved TVs were really made for

Television manufacturers briefly convinced the public that subtly bending the screen would create an impossibly immersive visual experience. In truth, the…

Discover more
The tiny switches that controlled arcade games
Technology

The tiny switches that controlled arcade games

Before complex setup menus existed, arcade owners controlled extreme difficulty spikes using a tiny block of microscopic physical switches soldered directly…

Discover more
Flour tossed on floors dictates your destiny
Myths & mysteries

Flour tossed on floors dictates your destiny

Making a massive mess in your kitchen is now a spiritual journey. Aleuromancy requires tossing flour on the ground and reading the shapes left behind. It is…

Discover more
Why tough foods can strengthen your jaw
Health

Why tough foods can strengthen your jaw

Bones absolutely thrive under sheer mechanical stress. The violent repetitive force of chewing tough, rigid items sends heavily localized signals commanding…

Discover more
Your brain floats in its own cushioning fluid
Science

Your brain floats in its own cushioning fluid

Without its specialized internal water park, your cranium would crush its own lower tissue under its sheer physical weight. Cerebrospinal fluid makes the…

Discover more
Noise limits at venues adhere to strict city laws
Culture & entertainment

Noise limits at venues adhere to strict city laws

If the sound suddenly drops during the finale, do not blame the audio technicians. Most open-air arenas are bound by draconian municipal ordinances that…

Discover more
Deserts claim a full third of global landmass
Travel

Deserts claim a full third of global landmass

Earth is surprisingly hostile to hydration. When you account for both scorching sandy wastelands and the freezing barren expanses of the polar extremes, about…

Discover more
Siberian mysticism required the spiritual healer to violently suck the disease out of a patient using their bare mouth
Myths & mysteries

Siberian mysticism required the spiritual healer to violently suck the disease out of a patient using their bare mouth

Say what you will about modern deductibles, at least your doctor doesn't try to inhale your sickness. Traditional Siberian shamans viewed illnesses as…

Discover more
Premium computer cases focus more on airflow than silence
Technology

Premium computer cases focus more on airflow than silence

Slapping thick sound-dampening foam onto every internal panel seems like a luxury upgrade, until everything inside starts cooking. High-end builds ditch the…

Discover more
Glutamate acts as the main excitatory signal
Health

Glutamate acts as the main excitatory signal

When your neural circuits urgently need to hit the gas pedal, they flood local synapses with this highly stimulating compound. Glutamate ensures that…

Discover more
Conference lanyards act as status symbols
Myths & mysteries

Conference lanyards act as status symbols

At those depressing airport hotel conventions, attendees judge each other entirely based on the color and thickness of their entry badges. Having a premium…

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