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A slot machine's spinning symbols are not a guide to its odds
Games

A slot machine's spinning symbols are not a guide to its odds

The game determines outcomes using its programmed probabilities, then displays the result through symbols and animation. A symbol looking close to a winning…

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Card-game judges interpret rules during tournaments
Games

Card-game judges interpret rules during tournaments

At tournaments, judges interpret complicated rules and explain how they apply to specific moves, such as a monster attack.

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PowerWash Simulator turns leftover grime orange
Games

PowerWash Simulator turns leftover grime orange

A highlight mode makes leftover grime glow bright orange, helping players spot the last tiny patch hidden on a huge surface.

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Richelieu's cats became part of his legend
History

Richelieu's cats became part of his legend

Later accounts surround the formidable cardinal with pampered cats, attendants, and elaborate feeding arrangements. The stories are not all securely…

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Modern triage began as a wartime system
Health

Modern triage began as a wartime system

French officers created triage to answer a grim practical question: with limited help and many wounded people, who needs attention first? That method of…

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Continuously variable transmissions use belts sliding between cones instead of fixed gears
Technology

Continuously variable transmissions use belts sliding between cones instead of fixed gears

The belt shifts higher or lower on the cones as they move closer together or farther apart, changing the ratio smoothly instead of making the car shift…

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End portals demand specific glowing orbs
Transport

End portals demand specific glowing orbs

An Eye of Ender leads players toward a stronghold, where its matching frame surrounds the End portal. Slot in the glowing orbs and the gateway wakes up:…

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Shimmering ponds transport users to cursed woods
Transport

Shimmering ponds transport users to cursed woods

The pond is the ride’s doorway: a boat glides across the reflective water, and the trees on the far bank seem to rise straight out of the shimmer. By the time…

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Catherine's memoirs turn Peter's toy soldiers into a royal embarrassment
History

Catherine's memoirs turn Peter's toy soldiers into a royal embarrassment

She described her husband playing with miniature troops and making her join late into the night. The account is revealing partly because of who tells it:…

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History

A Spanish king reportedly synchronized every clock in his palace

He reportedly paced around his palace to check that every clock showed the same time.

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There’s a medical code for walking into a lamppost
Health

There’s a medical code for walking into a lamppost

Medical coding gets very specific about how an injury happened, including a collision with a lamppost or another object that was not moving. Somewhere,…

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Bull riders endure massive physical impact forces
Culture & entertainment

Bull riders endure massive physical impact forces

Sensors on riders have recorded forces from bucks and falls comparable to a collision with a brick wall.

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There’s a medical code for aggressive turkey pecks
Health

There’s a medical code for aggressive turkey pecks

A doctor can use a specific code to document an injury caused by a turkey peck. It lets the medical record describe the oddly precise cause of the wound for…

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How compressed air turns into jackhammer force
Technology

How compressed air turns into jackhammer force

High-pressure air flips an internal valve back and forth, driving a heavy piston against the chisel thousands of times a minute.

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Why machine tools need a constant coolant spray
Technology

Why machine tools need a constant coolant spray

Coolant carries heat away from the cutting tool, helping keep the bit from overheating, losing its hardness, or welding itself to the workpiece.

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Why snacks at eye level aren't an accident
Economy

Why snacks at eye level aren't an accident

Brands may pay a store just to put their products where shoppers are likely to look. That makes the snack at eye level less of an accident than a paid…

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Hammering giant poles into mud supports tall skyscrapers
Technology

Hammering giant poles into mud supports tall skyscrapers

Pile drivers hammer concrete pillars deep through soft topsoil until they reach bedrock, giving the building a firm foundation.

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Nether portals require dark obsidian frames
Transport

Nether portals require dark obsidian frames

Obsidian makes the portal’s frame; lighting it fills the opening with a purple gateway. In Minecraft, the doorway doesn’t need hinges, a handle, or even a…

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