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Unelected officials entirely control national interest rates
Economy

Unelected officials entirely control national interest rates

People elected to office do not set national interest rates directly. Appointed central-bank officials do, and their decisions change how expensive it is for…

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The Maya made an intoxicating drink from tree bark
History

The Maya made an intoxicating drink from tree bark

Balché began with legume-tree bark soaked in water and honey; fermentation made it mildly intoxicating. At Maya festivals, it was more than a drink—it was…

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First internet radio broadcast happened in 1993
Technology

First internet radio broadcast happened in 1993

The live transmission featured the band Severe Tire Damage, showing that music could be broadcast around the world over the internet.

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Used hotel mattress springs become scrap metal
Economy

Used hotel mattress springs become scrap metal

A hotel mattress is bulky, but its steel springs can still be worth recovering. Specialized recyclers strip off the fabric and collect the dense metal, which…

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Earliest refrigerators used highly toxic cooling gases
History

Earliest refrigerators used highly toxic cooling gases

Mechanical refrigeration brought a dangerous tradeoff: early machines used toxic gases such as ammonia and sulfur dioxide, so a leak could turn cooling into a…

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Permafrost traps vast amounts of ancient carbon
Science

Permafrost traps vast amounts of ancient carbon

Permafrost is less like a sealed vault than a freezer full of food for microbes. Once it thaws, they break down the old organic matter, releasing mostly…

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At a French dinner, your fork stays in your left hand
Travel

At a French dinner, your fork stays in your left hand

Continental dining etiquette keeps the knife in the right hand and the fork in the left through cutting and eating. That avoids the hand-switching familiar in…

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Fire signs burn bridges over tiny inconveniences
Myths & mysteries

Fire signs burn bridges over tiny inconveniences

In the astrological stereotype, fire signs respond to small annoyances by cutting people off rather than compromising.

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Persona characters attend high school classes daily
Games

Persona characters attend high school classes daily

Even after fighting demons at night, the characters still attend school, take ordinary classes, and answer pop quizzes during the day.

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The Etch A Sketch was sold for almost nothing
Games

The Etch A Sketch was sold for almost nothing

Unable to afford a patent, the French electrician who invented it sold the design to an investor for very little.

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A stunt can look brutal because its protection is hidden
Games

A stunt can look brutal because its protection is hidden

Pads, rehearsed movements, controlled surfaces, and carefully chosen camera angles help sell an impact without presenting every part of the real setup. The…

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A fencing foil hides a button in its tip
Technology

A fencing foil hides a button in its tip

A spring-loaded plunger in the tip connects to a wire running down the blade. It takes about 500 grams of force to depress the plunger and register a hit.

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Some engineers use Factorio to test logic
Games

Some engineers use Factorio to test logic

Factorio’s conveyor-belt networks can get complex enough that software engineers use the game to test logic gates.

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Led Zeppelin's fourth album had no name
Culture & entertainment

Led Zeppelin's fourth album had no name

Led Zeppelin's fourth album had no band name or title on its cover, yet it went on to sell tens of millions of copies.

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Why economists watch garbage trains for recession signs
Economy

Why economists watch garbage trains for recession signs

Making goods leaves behind scrap metal, packaging and other industrial waste. When factories slow down, there’s less trash to ship by rail, so economists…

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Why people joke in the darkest moments
Psychology

Why people joke in the darkest moments

When a situation is frightening, a dark joke can break the feeling that fear owns every second. Shared laughter signals, “I’m here with you,” while making the…

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Metric system adoption required intense state coercion
History

Metric system adoption required intense state coercion

People trusted the local measures they already used, so French authorities spent decades enforcing the new base-ten system. Familiar units—including measures…

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An illusionist fasted while crowds taunted him with burgers
Culture & entertainment

An illusionist fasted while crowds taunted him with burgers

During a public fasting stunt, an illusionist sat in a transparent box suspended over a city as onlookers taunted him by flying hamburgers up to the glass.

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