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Double-tapping images provides faster user interaction
Culture & entertainment

Double-tapping images provides faster user interaction

On many photo-sharing apps, double-tapping an image is a shortcut for liking it, so users don't have to aim for a small button.

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Animated food uses highly saturated color palettes
Culture & entertainment

Animated food uses highly saturated color palettes

Colorists boost red and yellow so drawn pizza looks appetizing instead of like a muddy puddle.

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The toxic moon dust behind Portal 2's portals
Games

The toxic moon dust behind Portal 2's portals

In Portal 2, Cave Johnson has moon rock ground into conversion gel so portals can be placed on almost any surface. The dust is toxic, which helps explain his…

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Why birds leave white splashes on your car
Science

Why birds leave white splashes on your car

A bird’s white splat is mostly uric acid, a paste that lets birds get rid of waste without spending as much water as watery urine would. The dark part is…

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Agave syrup is not as healthy as it sounds
Health

Agave syrup is not as healthy as it sounds

Agave syrup may sound healthier because it is plant-derived, but much of its sweetness comes from fructose. It can contain a higher proportion of fructose…

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Barcelona can fine you for wearing swimwear off the beach
Travel

Barcelona can fine you for wearing swimwear off the beach

The rule was introduced to stop tourists from treating the whole city like a beach resort: swimwear is prohibited on city streets away from the sand.

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The marriage trial that lasted a year and a day
History

The marriage trial that lasted a year and a day

Couples tied their wrists together for the year-and-a-day trial, but could walk away if they decided not to commit permanently.

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Pirates had surprisingly democratic workplace rules
History

Pirates had surprisingly democratic workplace rules

Pirate crews agreed to written rules covering pay, injury compensation, and conduct—and could vote out a captain who abused his authority. Even at sea, the…

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Why red and blue can look three-dimensional
Psychology

Why red and blue can look three-dimensional

Your eyes don’t focus every color at exactly the same distance. The visual system can interpret that small mismatch as a difference in depth, making red and…

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Flatbed trailers have no sides and rely entirely on straps
Transport

Flatbed trailers have no sides and rely entirely on straps

Straps clamp cargo to the trailer, increasing the grip between the load and the deck and holding it against shifts. A flatbed looks like it forgot to bring…

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A scramjet needs another engine to get it going
Technology

A scramjet needs another engine to get it going

A scramjet uses the vehicle's enormous forward speed to compress incoming air instead of a rotating compressor. The air remains supersonic as fuel burns…

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Luxury hotel pillows use expensive down
Travel

Luxury hotel pillows use expensive down

Goose-down clusters compress under your head, so an expensive hotel pillow may feel plush but offer little firm neck support.

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Epcot’s giant golf ball collects its own rainwater
Culture & entertainment

Epcot’s giant golf ball collects its own rainwater

An internal gutter system channels rainwater through the structure’s legs and into the park’s lagoon.

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Peru grows more than 4,000 kinds of potatoes
Travel

Peru grows more than 4,000 kinds of potatoes

The Andes are the potato’s historical birthplace, and farmers grow varieties in vivid purples, deep reds, and twisted shapes.

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Anchorites attended their own funerals before isolation
Myths & mysteries

Anchorites attended their own funerals before isolation

Before being enclosed in a tiny room attached to a church, some anchorites attended a funeral service held for them. The church treated them as dead to the…

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Why open-plan offices spread more than ideas
Health

Why open-plan offices spread more than ideas

A cough or conversation can send respiratory particles into the shared air. Open layouts let nearby coworkers share that air more easily, giving a virus more…

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Thousands of adults battle in homemade foam armor
Travel

Thousands of adults battle in homemade foam armor

Thousands gather in fields wearing homemade foam armor and swinging padded weapons, while keeping track of hits with damage points.

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A Civil War general wanted reporters to sign their work
Culture & entertainment

A Civil War general wanted reporters to sign their work

Joseph Hooker required named battlefield reporting so responsibility for errors or security disclosures could be traced. That was one strand in the history of…

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