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Why tempered glass breaks into safer pebbles
Rapidly cooling the outer surfaces while the core stays hot locks stress into the pane. When it breaks, that stress makes it crumble into small, relatively…
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How a tabloid bought scandals to bury them
In a practice called “catch and kill,” the tabloid bought exclusive rights to damaging stories so it could keep them from being published.
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A bird of prey can make a public space less inviting to gulls
Trained raptors are used as a deterrent where birds gather around food and people. Their presence signals danger, encouraging other birds to move elsewhere…
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Miniature golf windmills require expensive upkeep budgets
That little windmill spinning over a miniature-golf hole isn't free to keep spinning. Weather and stray putts wear on the blades, while animatronic alligators…
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A cruise ship can have a holding room below the holiday decks
Large cruise ships can use secure rooms to detain someone involved in a serious incident until authorities take over ashore. The ship has to manage security…
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Racing turns thousands of dollars into tire smoke
A racing team can spend thousands on specialized tires, then replace them several times in one event. The rubber wears fast, but the trade is more grip on the…
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Why car wheel wells are lined with felt
The wheel-well liner catches sharp tire noise and takes the sting out of stones kicked up from the road. That soft-looking fabric is doing a bouncer’s job:…
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There are burgers beneath the Louvre
The Carrousel du Louvre shopping complex has a McDonald's. It is connected to the museum's underground entrance, not tucked between the paintings. That puts…
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Two different messages can give your right ear an advantage
In dichotic listening tests, a different speech sound goes to each ear at the same time. People commonly report the right-ear sound more accurately, a pattern…
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Ferris wheels need perfect balance to stop motor burnout
Operators distribute passengers around the wheel to keep its load balanced. If too much weight gathers on one side, the drive motors have to work harder…
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Sarcasm asks you to understand words backward
Say “Perfect timing” when someone arrives after everything is over, and the compliment means a complaint. The listener has to combine the words with the…
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Therapeutae danced all night in the desolate desert
After a week of silent isolation, they gathered to sing, eat sparingly, and dance until dawn.
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Pneumatic tubes launch physical items via air vacuums
A vacuum fan lowers the pressure at the receiving end, and higher air pressure behind the capsule pushes it through the sealed tube.
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Boskoi monks lived exactly like grazing wild animals
They refused to cook or farm, eating raw grass and weeds directly from the ground.
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Black hair reigns as the most common hair color globally
Hair gets much of its color from melanin. High levels of the dark pigment eumelanin produce black or dark brown shades, which are the most common hair colors…
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You have all your hair follicles before birth
The follicles that grow your hair are established before birth—roughly five million of them. Later, hair shafts grow from those existing follicles rather than…
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Why elite show-jumping horses cost millions
A horse that can clear tall fences cleanly is not just purchased; it must be trained and transported for competition. Those costs help explain why elite show…
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Window tint is merely a cheap polyester film
The glass stays ordinary; a coated polyester sheet does the filtering. Its thin layers cut glare and sunlight for a fraction of the drama of installing…
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Curling ice is covered in tiny frozen bumps
Curling ice is sprayed with water that freezes into tiny bumps called pebble. The texture helps the stones glide instead of sticking to the ice.
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Badminton began as India's game of Poona
British players brought the Indian game of Poona back to England, then renamed it after Badminton House and recast it as a genteel lawn game. The sport…
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Bop It's inventor wanted the player to become the spectacle
Dan Klitsner describes the design principle as animating the person rather than merely the toy. Spoken commands make someone react, move, hesitate, and…
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Evagrius Ponticus categorized primary evil thoughts
The fourth-century monk cataloged intrusive thoughts that could distract hermits, including urges such as anger and thoughts of food.
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Why corgis are so low to the ground
Corgis were bred to stay low so they could nip at livestock’s heels and dodge kicks from cattle.
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Pelagians believed humans could achieve total perfection
Pelagians argued that people could choose to be sinless without divine grace—a view church authorities condemned as heresy.
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