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Why escalator handrails never quite match the steps
Transport

Why escalator handrails never quite match the steps

The steps and handrail run on separate loops, and the rubber rail stretches and wears as it travels. That tiny difference lets your hand drift ahead of—or lag…

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Most people aboard the Hindenburg survived
Transport

Most people aboard the Hindenburg survived

Despite the fire, 62 of the 97 passengers and crew aboard the airship survived the crash.

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The tiny brain region that controls your hormones
Science

The tiny brain region that controls your hormones

The hypothalamus monitors clues such as body temperature and water balance, then helps choose a response. It can prompt thirst or shivering and direct the…

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Libra placements stare at wall paint swatches endlessly
Myths & mysteries

Libra placements stare at wall paint swatches endlessly

They can agonize over the difference between eggshell and cream until the hardware store kicks them out.

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Catherine the Great had a professional foot tickler
History

Catherine the Great had a professional foot tickler

Her foot ticklers soothed her feet and sang erotic ballads as she fell asleep—a royal bedtime routine with a surprisingly specific job description.

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Under the sunbeams means getting slightly roasted alive
Myths & mysteries

Under the sunbeams means getting slightly roasted alive

Even outside the hottest zone, the glare leaves it blinded and exhausted, like trying to work through metaphorical heatstroke.

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A poker hand carries Wild Bill Hickok's death story
Games

A poker hand carries Wild Bill Hickok's death story

The Dead Man's Hand is traditionally identified as two black aces and two black eights, linked to the cards Hickok held when he was shot in 1876. The precise…

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Biliary gallstones form as solid cholesterol rocks
Health

Biliary gallstones form as solid cholesterol rocks

Bile normally keeps cholesterol mixed into digestive fluid, but if its chemical balance shifts, some cholesterol can come out of solution and form crystals.…

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Flossing saves your gums from slow destruction
Health

Flossing saves your gums from slow destruction

Without floss, plaque can remain on about 30% of your tooth surfaces—like vacuuming the middle of a room and leaving the corners untouched.

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Dehydration can starve kidneys of blood, not just water
Health

Dehydration can starve kidneys of blood, not just water

A severe fluid shortage reduces circulation through the kidneys, depriving their tissues of the oxygen needed to work properly. Urine production falls, and…

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A wrong turn put Franz Ferdinand within an assassin's reach
History

A wrong turn put Franz Ferdinand within an assassin's reach

After an earlier attack failed in Sarajevo in 1914, the archduke's motorcade took a mistaken turn and stopped near Gavrilo Princip. Princip seized the…

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Mass production makes individual items aggressively cheaper
Economy

Mass production makes individual items aggressively cheaper

Making the first unit means paying to set up production. Once the line is running, that setup bill can be divided among many items, lowering each one's…

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A cruise ship produces thousands of gallons of sewage
Transport

A cruise ship produces thousands of gallons of sewage

Thousands of passengers generate sewage from toilets as well as wastewater from showers, sinks, and laundries. Ships need collection, storage, and treatment…

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Virgo folds laundry immediately upon leaving the dryer
Myths & mysteries

Virgo folds laundry immediately upon leaving the dryer

They treat wrinkles as an offense against order, pulling clothes from the dryer while they're still hot and folding them with military precision.

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The ancient stone walls built like giant jigsaws
History

The ancient stone walls built like giant jigsaws

Andean masons carved stones with as many as twelve angled corners, fitting them together like a giant jigsaw puzzle to build tightly interlocking walls.

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Denied entry remains on your permanent record
Travel

Denied entry remains on your permanent record

A refusal may be recorded and can come up on later visa applications, which may ask whether you have ever been denied entry.

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A bigger dinner group can leave a smaller tip percentage
Economy

A bigger dinner group can leave a smaller tip percentage

A 1975 study of 396 dining groups found that tips, relative to the bill, tended to fall as group size rose. The researchers linked this to shared…

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Some chimps turn down food when a neighbor gets a better deal
Psychology

Some chimps turn down food when a neighbor gets a better deal

In a study of 16 chimpanzees, researchers varied rewards and effort in a task. The animals' willingness to participate depended partly on what their partner…

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