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In the Centipede Game, perfect logic can end the profit early
Economy

In the Centipede Game, perfect logic can end the profit early

Two players take turns choosing whether to stop and take money or continue as the rewards grow. Reasoning backward from the final move can make stopping…

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When solid ground turns into liquid mud
Science

When solid ground turns into liquid mud

When shaking squeezes water between soil grains, the water pressure can rise and push the grains apart. Without enough friction to lock together, saturated…

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Parallel parking spaces occupy premium asphalt
Transport

Parallel parking spaces occupy premium asphalt

Parallel parking uses the narrow strip beside the curb instead of carving deep bays into the street. That leaves more room for traffic—and asks each driver to…

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Bribing your noisy neighbor to finally turn off the stereo
Economy

Bribing your noisy neighbor to finally turn off the stereo

The deal works only if silence matters more to the neighbor than loud music matters to the stereo owner. The neighbor can offer money to turn it down, and if…

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Babies start developing sleep cycles before birth
Health

Babies start developing sleep cycles before birth

A fetus doesn’t need daylight to begin forming rhythms: by the third trimester, active and quiet periods already come in cycles. The clock is still…

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Diamond interchanges force traffic to halt
Transport

Diamond interchanges force traffic to halt

At a diamond interchange, traffic from the ramps meets cross traffic at a small set of intersections. Those crossing and turning paths need traffic lights to…

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Why Porsche vanished from rival racing games
Games

Why Porsche vanished from rival racing games

A licensing agreement kept competing racing-game publishers from including Porsche models for nearly two decades, until they were allowed to render the cars.

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Tony Hawk refused $500,000 to keep his game royalties
Games

Tony Hawk refused $500,000 to keep his game royalties

He recalled Activision offering a buyout of future royalties when his finances had finally become comfortable enough to take a risk. Hawk kept the ongoing…

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Devotees light small oil lamps to dispel spiritual darkness
Myths & mysteries

Devotees light small oil lamps to dispel spiritual darkness

Lighting a consecrated space with an oil lamp and cotton wick symbolizes divine knowledge overcoming ignorance, while giving practitioners a focal point for…

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Where steam trains still rumble through Eastern Europe
Travel

Where steam trains still rumble through Eastern Europe

In remote parts of Eastern Europe, coal-fired steam trains still run, and airborne soot can leave passengers' clothes dirty.

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Socks with sandals remains the ultimate tourist uniform
Travel

Socks with sandals remains the ultimate tourist uniform

It's often read as a sign someone is on vacation and unfamiliar with local style.

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Concrete bollards ruthlessly defend physical spaces
Transport

Concrete bollards ruthlessly defend physical spaces

Bollards mark the boundary between cars and people, and their mass makes that boundary hard to ignore. A painted line asks drivers to behave; a concrete post…

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Angry Birds became a global hit on a tiny budget
Games

Angry Birds became a global hit on a tiny budget

A small studio built the game around a simple physics mechanic, and it dominated pop culture for a decade.

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Copper wiring conducts electricity better than iron
Science

Copper wiring conducts electricity better than iron

Copper lets electric charge flow with less resistance than iron does. Less energy gets diverted into heating the wire, so copper carries the same current with…

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Epic's free games are a way to build your next shopping habit
Games

Epic's free games are a way to build your next shopping habit

Giveaways bring people into the store and add titles to their libraries. Returning to claim another game creates another encounter with the storefront, its…

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Tomb Raider once used real-life models
Games

Tomb Raider once used real-life models

Early Tomb Raider promotions used real-life models to pose as Lara Croft, bringing the low-polygon heroine to life off-screen.

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Devotees submerge entirely into freezing sacred rivers
Myths & mysteries

Devotees submerge entirely into freezing sacred rivers

Devotees believe that fully immersing themselves in sacred rivers washes away spiritual impurities; the freezing water makes the ritual a bracing experience.

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Why a Phillips screwdriver slips out under pressure
Technology

Why a Phillips screwdriver slips out under pressure

The sloping faces of a Phillips recess can push the driver upward as torque rises, a behavior called cam-out. A poor fit, wear, or insufficient engagement…

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