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 1154 / 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 you should not take a pulse with your thumb
Health

Why you should not take a pulse with your thumb

A thumb can seem like a handy pulse-checking tool, but its own artery can throb under your skin. That means the beat you feel may belong to you, not the…

Discover more
IKEA’s biggest retailer is owned by a foundation
Economy

IKEA’s biggest retailer is owned by a foundation

Ingka Group, which operates many IKEA stores, belongs to the Dutch Stichting INGKA Foundation. The brand and franchise system sit in a separate corporate…

Discover more
Aphids can be born already carrying the next generation
Science

Aphids can be born already carrying the next generation

When conditions are favorable, a female aphid can make daughters without mating—and those daughters may already contain developing embryos of their own. The…

Discover more
An ancient dugout canoe predates the earliest known wheels
Transport

An ancient dugout canoe predates the earliest known wheels

The Pesse canoe from the Netherlands dates to roughly 8000 BC, thousands of years before the earliest known wheeled vehicles. Hollowing a tree trunk created a…

Discover more
Mass Effect 2 makes you budget for getting lost in space
Games

Mass Effect 2 makes you budget for getting lost in space

Travel between stars in the galaxy map burns the Normandy's fuel, while exploring planets uses probes. Run out of fuel and the game consumes valuable…

Discover more
Left 4 Dead grew from Counter-Strike bots armed with knives
Games

Left 4 Dead grew from Counter-Strike bots armed with knives

Developers found it fun to face swarms of knife-wielding bots with a small, heavily armed team. That experiment helped supply the foundation for the…

Discover more
Kenya's mobile libraries travel by camel
Transport

Kenya's mobile libraries travel by camel

The Kenya National Library Service developed a camel library service in the Garissa region to reach communities far from conventional branches. Animals…

Discover more
A famous airport story turns walking time into a waiting-time solution.
Transport

A famous airport story turns walking time into a waiting-time solution.

A famous airport story turns walking time into a waiting-time solution. In a widely repeated account about Houston, directing arriving passengers on a longer…

Discover more
Pac-Man's fruit counter helps wreck level 256.
Games

Pac-Man's fruit counter helps wreck level 256.

Pac-Man's fruit counter helps wreck level 256. An overflowing counter sends the routine that draws the little fruit icons beyond its intended limits. It…

Discover more
Seventeenth-century alchemist Hennig Brand was so convinced he could create the Philosopher's Stone to turn lead into gold that he boiled down 1,500 gallons of human urine in his basement.
Myths & mysteries

Seventeenth-century alchemist Hennig Brand was so convinced he could create the Philosopher's Stone to turn lead into gold that he boiled down 1,500 gallons of human urine in his basement.

Seventeenth-century alchemist Hennig Brand was so convinced he could create the Philosopher's Stone to turn lead into gold that he boiled down 1,500 gallons…

Discover more
Some color laser printers leave an invisible-looking signature on the page.
Technology

Some color laser printers leave an invisible-looking signature on the page.

Some color laser printers leave an invisible-looking signature on the page. Tiny yellow dots can encode identifying information such as a printer’s serial…

Discover more
Mystics spent decades claiming that thirteen ancient Mesoamerican crystal skulls held massive psychic energy, could cure cancer, and were possibly dropped off by hyper-advanced alien tourists.
Myths & mysteries

Mystics spent decades claiming that thirteen ancient Mesoamerican crystal skulls held massive psychic energy, could cure cancer, and were possibly dropped off by hyper-advanced alien tourists.

Mystics spent decades claiming that thirteen ancient Mesoamerican crystal skulls held massive psychic energy, could cure cancer, and were possibly dropped off…

Discover more
Sixteenth-century French astrologer Nostradamus is world-famous for writing vague, mystical quatrains that conspiracy theorists constantly twist to predict modern historical disasters.
Myths & mysteries

Sixteenth-century French astrologer Nostradamus is world-famous for writing vague, mystical quatrains that conspiracy theorists constantly twist to predict modern historical disasters.

Sixteenth-century French astrologer Nostradamus is world-famous for writing vague, mystical quatrains that conspiracy theorists constantly twist to predict…

Discover more
Sean Connery was offered the role of Gandalf in The Lord of the Rings trilogy along with a massive 15% stake in the box office profits, but he turned it down simply because he didn't understand the script.
Culture & entertainment

Sean Connery was offered the role of Gandalf in The Lord of the Rings trilogy along with a massive 15% stake in the box office profits, but he turned it down simply because he didn't understand the script.

Sean Connery was offered the role of Gandalf in The Lord of the Rings trilogy along with a massive 15% stake in the box office profits, but he turned it down…

Discover more
Marketing executives for the 1999 indie horror film The Blair Witch Project ran such a convincing promotional campaign using fake police reports and missing persons posters that…
Culture & entertainment

Marketing executives for the 1999 indie horror film The Blair Witch Project ran such a convincing promotional campaign using fake police reports and missing persons posters that…

Marketing executives for the 1999 indie horror film The Blair Witch Project ran such a convincing promotional campaign using fake police reports and missing…

Discover more
Pisa's tower is curved as well as tilted.
Travel

Pisa's tower is curved as well as tilted.

Pisa's tower is curved as well as tilted. The lean began during construction as the ground settled unevenly. Later builders tried to compensate by making…

Discover more
Your brain runs on roughly twenty watts of metabolic power.
Health

Your brain runs on roughly twenty watts of metabolic power.

Your brain runs on roughly twenty watts of metabolic power. That is an energy-use comparison, not electricity available from a socket in your head. Cells…

Discover more
British colonial authorities actually built a massive scaffold of bamboo over the entire Taj Mahal during World War Two in order to disguise the glowing white marble monument from Japanese bomber planes.
Travel

British colonial authorities actually built a massive scaffold of bamboo over the entire Taj Mahal during World War Two in order to disguise the glowing white marble monument from Japanese bomber planes.

British colonial authorities actually built a massive scaffold of bamboo over the entire Taj Mahal during World War Two in order to disguise the glowing white…

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