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How Earth sheds heat into space
Transport

How Earth sheds heat into space

Earth's warm surface sends infrared energy upward; some escapes through the atmosphere into space. The planet mails its heat as light, because space has no…

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Why electricity arrives before electrons
Transport

Why electricity arrives before electrons

Electrons drift along a wire like a crowd shuffling through a doorway, but the electrical signal travels through the circuit close to the speed of light.…

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Hostile environments naturally breed poor results
Economy

Hostile environments naturally breed poor results

When employees are busy avoiding trouble, they have less room to suggest a better idea. Fear and intimidation can turn a team’s attention from solving…

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LaserDisc read movies with a laser—but the picture was analog
Technology

LaserDisc read movies with a laser—but the picture was analog

The disc stored the video signal as a continuously varying recording read optically, unlike a DVD’s digitally encoded picture. Some editions paired that…

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Your duffel bag is named after a Belgian town
Travel

Your duffel bag is named after a Belgian town

The word comes from Duffel, a town in Belgium where thick wool cloth was made in the 17th century. Soldiers later used the durable fabric for bags.

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When jousting meant knocking rivals off rowboats
History

When jousting meant knocking rivals off rowboats

In southern France, competitors stood on platforms fixed to rowboats and tried to knock each other into the river with long poles. The boats made balance part…

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Stigmatic wounds remain open permanently
Myths & mysteries

Stigmatic wounds remain open permanently

Believers say the wounds can bleed for years without becoming infected, a claim that runs counter to ordinary expectations about healing.

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Rotoscoping requires tracing live footage frame by frame
Technology

Rotoscoping requires tracing live footage frame by frame

Artists filmed actors, projected the footage onto frosted glass, and traced their outlines frame by frame, producing the unusually fluid movement seen in…

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Why Disney parks put trash cans 30 steps apart
Travel

Why Disney parks put trash cans 30 steps apart

Walt Disney reportedly settled on 30 steps after observing how far guests would carry trash before dropping it.

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Why a boss's weapon gets weaker when you pick it up
Games

Why a boss's weapon gets weaker when you pick it up

The game sharply reduces the sword's damage once it becomes loot: the weapon that killed you in one hit suddenly does far less in your hands.

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Theater applause used to be a paid job
History

Theater applause used to be a paid job

A claque was a group hired to applaud performers. Its members supplied the reaction a production wanted the rest of the audience to join. Before online likes…

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Why diners once tilted bowls away from themselves
History

Why diners once tilted bowls away from themselves

Etiquette guides treated pulling a bowl toward yourself as uncivilized, so diners were told to tilt it away—even if that made spilling more likely. Good…

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What repetitive clicking can do to your hand
Health

What repetitive clicking can do to your hand

Each click is a small motion, but thousands of repetitions can irritate tendons and other tissues in the hand. When those tissues get sore, an ordinary…

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Maria of Oignies cut off chunks of her flesh
Myths & mysteries

Maria of Oignies cut off chunks of her flesh

She turned private religious grief into a bodily act of penance, reflecting the extreme forms medieval mysticism could take.

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People who swear more may lie less
Psychology

People who swear more may lie less

People often tidy their language to manage how they come across. Someone who swears freely may be doing less of that verbal grooming, which can correlate with…

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Crystals transport thermal energy via quantized sound waves
Transport

Crystals transport thermal energy via quantized sound waves

In a crystal, neighboring atoms vibrate and pass energy through the solid. Those vibrations come in quantized packets called phonons, so heat travels more…

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Spamming the interact key collects nearby loot instantly
Games

Spamming the interact key collects nearby loot instantly

A single button can collect nearby items straight into your inventory, skipping the slow process of picking them up one by one.

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Network routing transports users to the nearest server clone
Transport

Network routing transports users to the nearest server clone

Web services keep copies of content on servers in different locations. Network routing sends a request toward a nearby copy, cutting the distance data…

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