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Why a tape measure blade is curved
Technology

Why a tape measure blade is curved

The blade’s curved cross-section stiffens the thin metal, letting it extend farther before buckling. It can still flex when you bend it.

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Mashing two flat images into three dimensions
Psychology

Mashing two flat images into three dimensions

Hold two nearly identical pictures side by side and your brain can fuse them into depth. Each eye gets a slightly different view; the mind compares those…

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Spiritual seekers travel endlessly across continents on foot
Myths & mysteries

Spiritual seekers travel endlessly across continents on foot

For wandering ascetics, years of walking between distant holy sites can itself be the practice: leaving familiar comforts is meant to cultivate impermanence…

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Overpacking ensures lugging clean shirts all around
Travel

Overpacking ensures lugging clean shirts all around

Packing extra clothes can mean hauling sweaters and shirts you never wear all the way to your destination and back. They get an expensive trip while staying…

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Cloverleaf interchanges consume massive land plots
Transport

Cloverleaf interchanges consume massive land plots

A cloverleaf sends turning cars around looping ramps so traffic crosses without a stoplight. Those broad curves keep cars moving, but they need acres of…

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Spanish dinners rarely commence before ten at night
Travel

Spanish dinners rarely commence before ten at night

Many Spanish restaurants don't begin serving dinner until around 10 p.m., so arriving at six may leave you waiting for the kitchen to open.

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Mystics rely on intricate knots tied into devotional ropes
Myths & mysteries

Mystics rely on intricate knots tied into devotional ropes

Monks use the knots as tactile aids to focus during thousands of daily prayers.

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Early space meals were squeezed directly from tubes
History

Early space meals were squeezed directly from tubes

In weightlessness, loose crumbs could float into equipment or astronauts’ eyes, so early meals came as puréed beef and vegetables in aluminum tubes.…

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America once wanted to farm hippos in Louisiana
Economy

America once wanted to farm hippos in Louisiana

Louisiana’s 1910 hippo proposal promised weed control and a new source of meat. Its boosters gave the product an optimistic name: “lake cow bacon.”

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Everyone involved in a negative-sum game loses everything
Economy

Everyone involved in a negative-sum game loses everything

A country can win a war and still lose wealth, roads, buildings and lives. Fighting shrinks the resources both sides have left; the winner gets the victory,…

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Devotees heavily burden themselves during religious festivals
Myths & mysteries

Devotees heavily burden themselves during religious festivals

At some festivals, devotees carry massive, decorated structures for miles as an offering and display of faith.

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Springs store mechanical energy when physically compressed
Science

Springs store mechanical energy when physically compressed

Bend or compress a spring and you force its material away from its relaxed shape, storing energy in that deformation. Let go and the spring pushes back,…

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Why packed esports stadiums can still lose money
Games

Why packed esports stadiums can still lose money

A packed arena and millions of viewers don't guarantee enough revenue: some competitive esports scenes still burn through venture capital while operating at a…

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Your video-game character may be just floating arms
Culture & entertainment

Your video-game character may be just floating arms

In some games, the first-person model is just the arms and weapon; body parts outside the camera's view aren't rendered, saving processing power.

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Buying physical local SIM cards is largely obsolete nowadays
Travel

Buying physical local SIM cards is largely obsolete nowadays

Digital roaming profiles let travelers connect without swapping a physical SIM, eliminating the paperclip ritual at the train station.

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A shoebox under a bed protected the World Cup trophy
History

A shoebox under a bed protected the World Cup trophy

During World War II, Italian football official Ottorino Barassi hid the Jules Rimet Trophy in his Rome home to keep it from Nazi hands. The gold-plated silver…

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Dubai's creek crossing can cost just two dirhams
Travel

Dubai's creek crossing can cost just two dirhams

RTA lists several abra routes across Dubai Creek at AED 2. These small passenger boats link old trading neighborhoods as part of the city's transport network.…

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The terrifying seventeenth-century ancestor of the pressure cooker
Technology

The terrifying seventeenth-century ancestor of the pressure cooker

A French physicist sealed boiling water in an iron pot to soften bones, but its fragile steam valve could make the vessel dangerous if it wasn't watched.

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