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Windshield wipers use graphite-treated rubber to glide quietly across wet glass
Technology

Windshield wipers use graphite-treated rubber to glide quietly across wet glass

A thin layer of graphite embedded in the rubber acts like a lubricant, helping the blade move quietly across the glass.

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Government agencies funded attempts to visualize distant places during the Cold War
Myths & mysteries

Government agencies funded attempts to visualize distant places during the Cold War

Remote viewing meant sitting quietly and trying to picture distant places without traveling there.

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Astrologers slice zodiac signs into three ten-degree decans just to make your horoscope more complicated
Myths & mysteries

Astrologers slice zodiac signs into three ten-degree decans just to make your horoscope more complicated

Each decan is ruled by a different planet, giving astrologers three subdivisions within every sign.

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Spiders use hydraulic pressure to extend their legs
Science

Spiders use hydraulic pressure to extend their legs

Fluid pressure helps straighten a spider’s legs, so the animal doesn’t need an outward-pushing muscle at every joint. When pressure drops after death, the…

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A completely true answer can still mislead you
Psychology

A completely true answer can still mislead you

Psychologists call this paltering: choosing accurate information that encourages a false conclusion. For example, saying you worked on a project every day…

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A tractor repair can depend on access to software
Economy

A tractor repair can depend on access to software

Modern farm equipment uses diagnostic programs as well as mechanical parts. In its 2025 Deere lawsuit, the FTC argued that restrictions on a fully functional…

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Your smallest blood vessels turn circulation into close-up delivery
Health

Your smallest blood vessels turn circulation into close-up delivery

Arteries branch into tiny capillaries that bring blood near the cells using its oxygen and nutrients. Their very thin walls let substances pass between blood…

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Flamingos owe their pink feathers to their diet
Health

Flamingos owe their pink feathers to their diet

Flamingos digest carotenoid pigments from algae and brine shrimp, then deposit them in growing feathers. Their pink isn’t painted on by the water; it comes…

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Why Mortal Kombat's blood turned gray on Nintendo
Games

Why Mortal Kombat's blood turned gray on Nintendo

Nintendo pushed developers to recolor the blood gray to protect its family-friendly image, making it look like sweat.

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Video-game ragdoll physics turns bad collisions into bodies that fold like spaghetti
Games

Video-game ragdoll physics turns bad collisions into bodies that fold like spaghetti

Game engines use constraints to limit how body parts move; when a fast collision pushes those limits, a character can fold and tumble in absurd ways.

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In one gum study, timing mattered more than chewing nonstop
Psychology

In one gum study, timing mattered more than chewing nonstop

Participants who chewed gum for five minutes before testing gained an advantage on several tasks during the first 15–20 minutes. Chewing throughout the tests…

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How jet skis move without exposed propellers
Transport

How jet skis move without exposed propellers

A jet ski sucks water through an intake, spins it with an internal impeller, then shoots it out through a steering nozzle. The backward jet pushes the craft…

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Observers said Teresa of Avila melted snow around her during ecstatic states
Myths & mysteries

Observers said Teresa of Avila melted snow around her during ecstatic states

Observers reported that Teresa of Avila’s ecstatic states produced enough heat to melt snow around her, puzzling physicians of her era.

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A coffee break became a court case about paid work
Economy

A coffee break became a court case about paid work

A weaving business introduced breaks because they improved employees' efficiency, then excluded that time from wages. In 1956, a federal appeals court treated…

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Economy

Parents cannot watch babysitters, letting teens prioritize phones over childcare

When parents are away, a teen babysitter may spend more time on a phone than on a toddler’s routine. With no parent watching, the incentive can shrink to…

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Houdini died after a fan punched him in the stomach
Culture & entertainment

Houdini died after a fan punched him in the stomach

Houdini died of peritonitis after his appendix ruptured, not during an escape act. A fan had punched him in the abdomen shortly beforehand, but that timing…

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Why millions of old books and films remain inaccessible
Economy

Why millions of old books and films remain inaccessible

A library may have a book in hand and still be afraid to preserve or share it. If no one can find the author or heirs, permission is unclear—and a lawsuit…

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Why your veins look blue when blood is red
Health

Why your veins look blue when blood is red

Blood in your veins is red, but you view it through skin that scatters and absorbs light. The light returning to your eyes makes some veins look blue; the…

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