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Why barometers once used poisonous mercury
Technology

Why barometers once used poisonous mercury

Mercury is dense enough for atmospheric pressure to move it in a short glass tube; water would require a tube about 20 feet tall. Its toxicity made it…

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Baffling riddles about clapping confuse seekers
Myths & mysteries

Baffling riddles about clapping confuse seekers

The question is a Zen koan, meant to frustrate ordinary logic rather than invite a literal answer.

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Celine Dion nearly rejected her biggest hit
Culture & entertainment

Celine Dion nearly rejected her biggest hit

She thought the song sounded awful and refused to record it until her manager persuaded her to make one demo. That reluctant take became a huge hit.

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Forging aligns internal metallic grains to boost strength
Technology

Forging aligns internal metallic grains to boost strength

Forging deforms hot metal so its grain flow follows the shape of the part, which can improve strength and durability compared with casting.

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Why tennis balls come in pressurized cans
Economy

Why tennis balls come in pressurized cans

The sealed can is pressurized to help keep pressure inside the tennis balls, preserving their bounce until you open it. The packaging is doing more than…

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Why movie posters from the same genre look alike
Culture & entertainment

Why movie posters from the same genre look alike

Studios reuse familiar genre layouts, such as floating heads or a protagonist staring over a shoulder, so posters quickly signal what kind of movie to expect.

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Guys with planks created elaborate alien art
Myths & mysteries

Guys with planks created elaborate alien art

People using planks can flatten wheat into geometric patterns, creating crop circles that many mistook for alien messages.

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A flight number can quietly encode its direction
Transport

A flight number can quietly encode its direction

Some airlines assign odd and even numbers to opposite directions on a route. The convention helps distinguish paired services without writing the destination…

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Travel visas occupy entire pages of your booklet
Transport

Travel visas occupy entire pages of your booklet

A visa needs room for its dates, entry conditions, stamps, and security markings, so it often takes a full page instead of a tiny ink stamp. Crossing a border…

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The world's highest unclimbed peak is in Bhutan
History

The world's highest unclimbed peak is in Bhutan

Bhutan bars mountaineering above a certain altitude out of respect for local spiritual beliefs, leaving Gangkhar Puensum the world's highest unclimbed peak.…

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Hoary bats fly south just like many migratory birds do
Science

Hoary bats fly south just like many migratory birds do

Hoary bats migrate south for winter instead of hibernating in caves. On the way, they typically roost alone in trees, where mottled fur helps them blend into…

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Why one vivid story can beat a thousand studies
Psychology

Why one vivid story can beat a thousand studies

A thousand results can blur into “the data”; one story can follow someone through a bad day, a hard choice, and its consequences. That makes the story easier…

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Vertical farming exploits specific red and blue wavelengths
Technology

Vertical farming exploits specific red and blue wavelengths

Chlorophyll absorbs red and blue light for photosynthesis, so indoor farms often use purple grow lights that combine those wavelengths.

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Boiling herbs near your nether regions is trendy
Myths & mysteries

Boiling herbs near your nether regions is trendy

Yoni steaming involves sitting over steaming herbal water, often mugwort, and is marketed as a way to reset the body.

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LinkedIn now harbors extremely annoying corporate influencers
Culture & entertainment

LinkedIn now harbors extremely annoying corporate influencers

LinkedIn has become a stage for long, emotional posts about mundane work tasks, such as answering basic emails.

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Volleyball was invented as a gentler sport
Games

Volleyball was invented as a gentler sport

William G. Morgan created volleyball at a YMCA in 1895 as an alternative to the more strenuous contact of basketball. The net separated opponents, letting…

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People can describe trauma perfectly while avoiding its feelings
Science

People can describe trauma perfectly while avoiding its feelings

Logic isn’t the problem; it can genuinely help you understand something difficult. The shift comes when analysis takes the place of feeling: you can describe…

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QR codes can scan with 30% covered or damaged
Technology

QR codes can scan with 30% covered or damaged

QR codes use Reed–Solomon error correction, which can let a scanner read a code even when up to 30% is covered or damaged.

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