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NASA flew a helicopter where the air is barely there
Transport

NASA flew a helicopter where the air is barely there

Ingenuity used long, fast-spinning rotors and a very light body to fly in Mars's thin atmosphere. It also controlled itself: the radio delay made live…

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Declining an inheritance does not let you choose its next owner
Economy

Declining an inheritance does not let you choose its next owner

A qualified disclaimer under US tax rules means refusing the property without directing where it goes. The will or applicable law determines the next…

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Svalbard has no separate work-visa requirement
History

Svalbard has no separate work-visa requirement

Foreign nationals do not need a Norwegian residence permit to live or work on Svalbard. They still need to support themselves, and travel through mainland…

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Tetherball restricts an object to a fixed orbital path
Games

Tetherball restricts an object to a fixed orbital path

Because the ball is tied to a pole, each hit sends it around a fixed circular path. The game makes centripetal motion visible—and a poorly timed swing can…

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Korean hanbok skirts are tied above the bust
History

Korean hanbok skirts are tied above the bust

The high tie lets the fabric fall in a broad bell from just below the chest, creating hanbok’s signature silhouette without a fitted waist.

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Military amphibious transports roll straight into open water
Transport

Military amphibious transports roll straight into open water

The vehicle rolls down the bank until its sealed hull floats; then a propeller pushes it forward. The tires brought it to the water’s edge, but the boat part…

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Application programming interfaces dictate communication
Science

Application programming interfaces dictate communication

A weather app can ask a forecast service for data through an API, which specifies how the request and reply should be formatted. The app does not need to know…

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How stale bread became Russian kvass
History

How stale bread became Russian kvass

Stale rye bread got a second life when people soaked it in water and let it ferment into kvass, a mildly alcoholic drink. It’s a practical bit of kitchen…

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Amabie flaunts a bird beak and three odd legs
Myths & mysteries

Amabie flaunts a bird beak and three odd legs

According to the legend, it emerged from the ocean in the 19th century and told people to draw its portrait and show it around to prevent disasters—an early…

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People use fake names for online charts
Myths & mysteries

People use fake names for online charts

Some users enter names like Void Walker or John Doe, wary of giving even an outdated charting site their real name.

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True spicy food in Thailand makes unaccustomed visitors cry
Travel

True spicy food in Thailand makes unaccustomed visitors cry

Heat levels locals find mild can make unaccustomed visitors cough; a dish ordered at the local level may overwhelm diners unused to it.

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Gnostics divided humanity into three rigid spiritual tiers
Myths & mysteries

Gnostics divided humanity into three rigid spiritual tiers

Some Gnostic sects divided people into those ruled by matter, those with a soul, and an enlightened spiritual elite.

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Why Staten Island ferries turned orange
Transport

Why Staten Island ferries turned orange

Orange stands out against gray water and fog, making the ferries easier to spot. It is a practical safety color with a side benefit: nobody mistakes the boat…

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Having only one element is an absolute nightmare
Myths & mysteries

Having only one element is an absolute nightmare

In astrology, a chart dominated by one element is sometimes said to make that element's traits overwhelming; a fire-heavy chart, for example, is portrayed as…

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Tulum ruins sit precariously on a cliff edge
Travel

Tulum ruins sit precariously on a cliff edge

It served as a Maya fortress overlooking the Caribbean, with sweeping views from its cliffside perch.

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Why unsolicited advice feels like an insult
Psychology

Why unsolicited advice feels like an insult

Unsolicited advice can turn a conversation into a performance review. Instead of responding to what you said, the other person starts correcting your…

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Galileo spent his final years trapped under house arrest
History

Galileo spent his final years trapped under house arrest

After the Church forced him to recant his view that Earth moves around the Sun, Galileo was confined to his villa for the rest of his life. The order could…

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Pisces accidentally wears house slippers to supermarkets
Myths & mysteries

Pisces accidentally wears house slippers to supermarkets

In the stereotype, dreamy Pisces might wander into a supermarket in fuzzy slippers and notice only when they step in a cold puddle.

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