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Hegel returned to Berlin during the epidemic he had fled
History

Hegel returned to Berlin during the epidemic he had fled

The philosopher left the city during the 1831 cholera outbreak, then returned and died that November after a brief illness. Cholera was the diagnosis recorded…

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People in the Middle Ages wore protective amulets made of weasel testicles to ward off evil spirits
Myths & mysteries

People in the Middle Ages wore protective amulets made of weasel testicles to ward off evil spirits

The practice drew on sympathetic magic: women were advised to carry preserved weasel testicles in a leather pouch around the neck or thigh to promote…

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The joker that can only do three things
Games

The joker that can only do three things

It can fill in a straight or flush, or remain an ace—but it can’t stand in for any other card.

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Why Atlanta is the world's busiest air hub
Transport

Why Atlanta is the world's busiest air hub

Atlanta’s airport thrives as a hub: Delta gathers passengers there, then sends them onward on connecting flights. Its location in the southeastern United…

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Jet suits put miniature engines on your arms
Transport

Jet suits put miniature engines on your arms

Jet suits turn the pilot’s arms into steering controls: small turbines push downward, and changing their angle redirects the thrust. It’s flight by muscle…

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U.S. Steel became America's first billion-dollar corporation
Economy

U.S. Steel became America's first billion-dollar corporation

J.P. Morgan's 1901 combination brought major steel businesses under one enormous corporate roof. The company could coordinate operations on a scale its…

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Royal clocks make daylight saving a conservation job
Travel

Royal clocks make daylight saving a conservation job

The Royal Collection contains historic timepieces that need individual care as well as setting. Changing the clocks across royal residences can involve…

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Helen Duncan was the absolute last person imprisoned under the British Witchcraft Act in the twentieth century
Myths & mysteries

Helen Duncan was the absolute last person imprisoned under the British Witchcraft Act in the twentieth century

In 1944, authorities feared her séances could expose wartime secrets supposedly revealed by dead sailors, so they prosecuted her under the 1735 Witchcraft…

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Games

Sudoku's Japanese name came after its American debut

The modern puzzle appeared as Number Place in a US puzzle magazine in 1979, credited to Howard Garns. Japanese publisher Nikoli later popularized it under the…

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Mutual reception acts like a cosmic hostage exchange
Myths & mysteries

Mutual reception acts like a cosmic hostage exchange

In astrology, mutual reception occurs when two planets occupy each other’s ruling signs. The arrangement is interpreted as a reciprocal exchange that helps…

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Symmetry can make a shape pleasing before you know what it is
Psychology

Symmetry can make a shape pleasing before you know what it is

A balanced pattern gives the visual system regularities to detect and predict. Research on visual aesthetics often finds a preference for symmetry, although…

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Tattoos of elements get covered up most
Myths & mysteries

Tattoos of elements get covered up most

Minimalist elemental symbols can later feel like generic logos, so some people have tattoo artists cover them with larger designs, such as panthers.

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London's ceremonial sheep drive turns trading history into a public spectacle
Travel

London's ceremonial sheep drive turns trading history into a public spectacle

Modern events let Freemen of the City lead sheep across a Thames bridge to celebrate an old toll-free trading privilege. The organized ceremony is not a…

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Twin-tip skis curve upwards at both the front and back
Transport

Twin-tip skis curve upwards at both the front and back

A twin-tip ski lifts at both ends, so the tail doesn’t dig in when a skier travels backward. The same ski works forward or switch, sparing the skier a very…

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A stock option's calendar can influence an executive's incentives
Economy

A stock option's calendar can influence an executive's incentives

An option becomes valuable when the share price exceeds its exercise price, subject to vesting and other terms. That can align rewards with shareholders, but…

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Rockefeller became too rich for the word 'millionaire'
Economy

Rockefeller became too rich for the word 'millionaire'

Standard Oil made John D. Rockefeller America's first billionaire. By 1903, newspapers were already asking when he would cross that almost unimaginable…

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Why a heavy object makes a lighter one feel weightless
Psychology

Why a heavy object makes a lighter one feel weightless

Your brain judges weight partly by comparing the effort an object demands with what it just lifted. After a heavy load, a lighter one feels dramatically…

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Hard credit inquiries temporarily punish your score
Economy

Hard credit inquiries temporarily punish your score

A lender’s credit check can lower your score even when you’ve paid every bill on time. Scoring algorithms may read a new application as a sign of added risk.

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