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Clue's first design included a hypodermic syringe
Anthony Pratt's original murder game had more suspects and weapons than the version that reached stores in 1949. The syringe and an Irish walking stick were…
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Why armies targeted battlefield drummers
Without radios, armies relied on drummers to signal orders to advance, retreat, or fire. Enemies targeted them to disrupt communication across the opposing…
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Treaty of Versailles forced one nation to take all war guilt
Article 231 established Germany's liability for Allied reparations, but its language read in Germany as a sweeping assignment of blame. That gap between legal…
Discover moreEmail's @ sign solved a very small naming problem
Ray Tomlinson needed a separator between a person's username and the computer receiving the message. He chose a keyboard character people weren't using in…
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Polarization filters block specific light wave angles
Light waves can vibrate in different directions, and a polarizing filter acts like a gate that passes one direction while blocking others. Reflected glare…
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People born under the sign of Scorpio are statistically more likely to become serial killers
Some studies of famous serial killers report a slight overrepresentation of Scorpios, Pisces, and Cancers, but the finding is highly debated.
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Keep discovering with Stacky. Interesting facts in an app that is always within reach.

Why spending money on others feels better for longer
A gift doesn’t end at the checkout. You can remember the person’s reaction, revisit the moment, and feel the relationship behind it; that social meaning gives…
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Packing cubes revolutionized modern suitcase organization
Packing cubes divide a suitcase into zipped compartments, so shirts, chargers, and socks stop migrating into one giant textile mystery. They don’t create more…
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Why the Flying Dutchman must sail forever
In the legend, the captain swore he would round a cape even through an apocalyptic storm. The curse made that boast permanent: his ship would sail stormy seas…
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RollerCoaster Tycoon lets you pick up the customers
The game's pincers can lift a guest and place them on another path, including an isolated patch with no exit. That makes bizarre experiments possible, but it…
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The yo-yo needed demonstrators before it became a craze
Pedro Flores built a toy business in the late 1920s and hired skilled players to show what his yo-yos could do. The demonstration sold the idea: a wooden disk…
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Cathars believed the physical human body was a demonic trap designed to capture souls
Cathars saw the material world as evil and believed that sex trapped angelic souls in bodies. Their beliefs brought them into conflict with the Catholic…
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Sick people are the ones most likely to buy health coverage
Someone expecting expensive treatment has a strong reason to buy coverage; someone who expects little care may decide against it. If many low-cost customers…
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Duty-free liquid is not automatically cleared for your next flight
A connection can send you through security again. TSA has a special allowance for qualifying international duty-free liquids in an intact security bag with a…
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In two-player Uno, Reverse skips your opponent
With only two players, Reverse sends play straight back to you, so it functions like a Skip and gives you another turn.
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Skellig Michael features ancient stone dome huts
Medieval monks lived in small circular huts on the island’s exposed rock, long before it became a sci-fi filming location.
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French shepherds once took their work onto stilts
In the Landes region, stilts helped shepherds cross wet ground and see their flocks over scrub. A long staff could support them while they rested. What looks…
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Why Italians eat some pizza with a knife and fork
Fresh mozzarella makes an uncut Neapolitan pizza soft and messy, so a knife and fork are often the practical choice.
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Call of Duty grew out of the team behind a rival
Developers who had worked on Medal of Honor: Allied Assault formed Infinity Ward and created Call of Duty. The new series entered the same crowded World War…
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Edward Fortyhands traps you with your own drinks
Players tape large bottles of malt liquor to both hands, making ordinary tasks like opening a door or using the bathroom difficult until they finish the drinks.
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Pisces is the astrological sponge for collective guilt
In astrology, Pisces is the last sign of the zodiac, so it's sometimes cast as carrying the emotional baggage of the 11 signs before it—and apologizing for…
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Why Victorians hung bread from the ceiling
Families hung a Good Friday loaf from the ceiling, believing it would stay mold-free all year and protect the house from fire. The household charm could also…
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Majora's Mask lets you slow time by playing a song backward
Reverse the note sequence of the Song of Time and it becomes the Inverted Song of Time. The altered tune slows the countdown toward the falling moon, giving…
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Researchers took a model kidney on a roller coaster
For a 2016 study, a kidney model containing actual stones rode Disney's Big Thunder Mountain Railroad 20 times. Researchers measured whether stones moved out…
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