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Helicopter doors are frequently removed
Transport

Helicopter doors are frequently removed

Removing a helicopter door cuts weight and clears the opening for photographers or crews who need an unobstructed view. The aircraft loses a little protection…

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Your original idea may have come from a movie
Psychology

Your original idea may have come from a movie

A scene from a film can leave behind a thought that resurfaces years later without its source attached. Memory keeps the content more easily than the…

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A fire pole saves seconds but creates a fall risk
Transport

A fire pole saves seconds but creates a fall risk

The pole bypasses stairs, but firefighters still have to make a controlled descent under pressure. Some newer stations avoid the problem with a single-story…

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Brethren of the Free Spirit claimed they could not sin
Myths & mysteries

Brethren of the Free Spirit claimed they could not sin

They argued that a soul united with the divine could not sin, so even theft or lying could be framed as divine will. Authorities, unsurprisingly, did not…

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Stuffing mugwort under your pillow alters dreams
Myths & mysteries

Stuffing mugwort under your pillow alters dreams

Mugwort tucked into a pillow is said to bring vivid dreams, though the supposed astral adventures may leave you feeling unrested.

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How a DAO vote can empty its entire treasury
Technology

How a DAO vote can empty its entire treasury

Smart contracts carry out a DAO’s approved votes, so a majority of token holders can authorize a treasury transfer. If an attacker acquires enough voting…

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Portland aerial tram connects city districts through the sky
Transport

Portland aerial tram connects city districts through the sky

Two cabins travel on cables between Portland’s riverfront and the hilltop above it. Their steep aerial route skips the winding streets below, turning a…

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Pearls are just a clam allergic reaction
Myths & mysteries

Pearls are just a clam allergic reaction

For Cancer, a pearl's formation makes a neat metaphor for a grudge: an oyster coats an irritant in layers until it becomes a gem, much like irritation…

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The string trick inside Rubik's Magic
Games

The string trick inside Rubik's Magic

An internal loop of string lets the panels flip and fold over and over without the mechanism coming apart.

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You can pay someone to stand in line for you
Economy

You can pay someone to stand in line for you

If waiting would cost you an hour of work, you can hire someone to spend that hour in the queue instead. The stand-in holds your place, then steps aside when…

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Why late-night infomercials stop at 28½ minutes
Culture & entertainment

Why late-night infomercials stop at 28½ minutes

A 28½-minute infomercial leaves 90 seconds in a half-hour slot for required station identification and local commercials.

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When Zimbabweans washed dollar bills
Economy

When Zimbabweans washed dollar bills

Fresh U.S. bills were hard to come by, so people tried to keep their worn one-dollar notes usable. Some ran them through washing machines with soap, then hung…

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Compass bars compress digital spaces into spinning lines
Games

Compass bars compress digital spaces into spinning lines

A compass bar flattens 360 degrees of geographic space into a strip, sliding objective icons left or right according to their direction—like turning the world…

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Huli jing effortlessly transform into beautiful women
Myths & mysteries

Huli jing effortlessly transform into beautiful women

In Chinese lore, foxes that live long enough gain the power to take the form of beautiful women. They infiltrate aristocratic households and drain the…

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A televangelist tried to blow COVID-19 away on camera
Culture & entertainment

A televangelist tried to blow COVID-19 away on camera

In 2020, Kenneth Copeland blew toward the camera and declared that he was directing the wind of God at the coronavirus. The broadcast turned a public-health…

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A kitchen spice can cause a very unappetizing poisoning
History

A kitchen spice can cause a very unappetizing poisoning

Nutmeg in excessive amounts can cause confusion, hallucinations, a racing heart, and severe discomfort. The familiar flavoring contains biologically active…

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Decal systems slap flat graphical stickers onto architecture
Games

Decal systems slap flat graphical stickers onto architecture

The system adjusts each flat image to a surface's angle, letting designers add localized dirt without changing the underlying geometry.

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Unencrypted web traffic automatically defaults to port 80
Technology

Unencrypted web traffic automatically defaults to port 80

Unencrypted web traffic uses port 80 and travels in plain text, so someone snooping on the network can read what pages you’re browsing.

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